The MBA and M.Tech both courses are better for Master Degree after B.Tech.

If you are interested to become professional / master in particular Engineering discipline, so you should take admission in M.Tech Course.

You should get admission in one of following Engineering Colleges:

Top Engineering Colleges for M.Tech: (By Outlook 2017 Survey)
IIT Kanpur Kanpur
IIT Kharagpur Kharagpur
IIT Bombay Mumbai
IIT Madras Chennai
IIT Delhi Delhi
BITS Pilani Pilani
IIT Roorkee Roorkee
IT-BHU Varanasi
IIT Guwahati Guwahati
College of Engg, Anna University Guindy
Jadavpur University, Faculty of Engg & Tech Calcutta
Indian School of Mines Dhanbad
NIT Warangal
BIT, Mesra Ranchi
NIT Trichy
Delhi College of Engineering New Delhi
Punjab Engineering College Chandigarh
NIT Suratkal
Motilal Nehru National Inst. of Technology Allahabad
Thapar Inst of Engineering & Technology Patiala
Bengal Eng and Science University, Shibpur Howrah
MANIT Bhopal
PSG College of Technology Coimbatore
IIIT Hyderabad
Harcourt Butler Technological Institute Kanpur
Malviya National Institute of Technology Jaipur
VNIT Nagpur
NIT Kozhikode
Dhirubhai Ambani IICT Gandhinagar
Osmania Univ. College of Engineering Hyderabad
College of Engineering, Andhra University Vishakhapatnam
Netaji Subhas Institute of Technology New Delhi
NIT Kurukshetra
NIT Rourkela
SVNIT Surat
Govt. College of Engineering Pune
Manipal Institute of Technology Manipal
JNTU Hyderabad
R.V. College of Engineering Bangalore
NIT Jamshedpur
University Visvesvaraya College of Engg. Bangalore
VJTI Mumbai
Vellore Institute of Technology Vellore
Coimbatore Institute of Technology Coimbatore
SSN College of Engineering Chennai
IIIT Allahabad
College of Engineering Trivandrum
NIT Durgapur Durgapur
SIT Calcutta
Mumbai University Inst of Chemical Tech Mumbai

If you want to make your career in Business, you must to MBA. The MBA Program is available in following popular disciplines:

Marketing
Finance
Human Resource Management
Operations
Systems
Information Technology
Supply Chain Management etc.

List of Top MBA Colleges in India: (By Time4Education)
Faculty of Management Studies (FMS), University of Delhi, Delhi
Indian Institute of Management Ahmedabad (IIMA)
Indian Institute of Management Calcutta (IIMC)
Indian Institute of Management Bangalore (IIMB)
Indian Institute of Management Kozhikode (IIMK)
Indian Institute of Management Lucknow (IIML)
Jamnalal Bajaj Institute of Management Studies Mumbai (JBIMS)
Management Development Institute (MDI), Gurgaon
S. P. Jain Institute of Management & Research (SPJIMR), Mumbai
XLRI Xavier School of Management, Jamshedpur
Department of Management Studies, Indian Institute of Technology Delhi (IITD)
Indian Institute of Foreign Trade (IIFT), Kolkata
Indian Institute of Foreign Trade (IIFT), New Delhi
Indian Institute of Management Ranchi (IIMR)
Indian Institute of Management Indore (IIMI)
Indian Institute of Management Trichy
National Institute of Industrial Engineering (NITIE), Mumbai
Narsee Monjee Institute of Management Studies (NMIMS), Mumbai
Rajiv Gandhi Indian Institute of Management (RGIIM), Shillong
Shailesh J. Mehta School of Management (SJMSOM), Indian Institute of Technology Bombay (IITB)
Indian Institute of Management Indore (IIMI), Mumbai campus
Indian Institute of Management Raipur (IIM-Ra)
Indian Institute of Management Rohtak (IIM-Ro)
Indian Institute of Management Udaipur (IIMU)
Indian Institute of Management Kashipur (IIM-Ka)
MICA Ahmedabad
Symbiosis Centre for Management and Human Resource Development (SCMHRD), Pune
Symbiosis Institute of Business Management (SIBM), Pune
Tata Institute of Social Sciences (TISS), Mumbai
Vinod Gupta School of Management (VGSOM), Indian Institute of Technology Kharagpur
Department of Commerce,University of Delhi,Delhi School of Economics
Department of Financial Studies (DFS), University of Delhi, South Campus
Department of Industrial and Management Engineering (IME), Indian Institute of Technology Kanpur (IITK)
Department of Management Studies (DOMS), Indian Institute of Science Bangalore (IISc)
Department of Management Studies (DoMS), Indian Institute of Technology Madras (IITM)
Department of Management Studies (DOMS), Indian Institute of Technology Roorkee (IITR)
Institute of Management Technology (IMT), Ghaziabad
International Management Institute (IMI), New Delhi
Sydenham Institute of Management Studies and Research and Entrepreneurship Education (SIMSREE), Mumbai
Xavier Institute of Management Bhubaneswar (XIMB)