Which colleges can I expect after 46 marks in B section of the GATE examination???

If get 46 marks in gate then you will have a very good gate score, you will get gate all India rank near about 2000. You can expect call from the colleges given below:

IIT (BHU) Varanasi
IIT Bhubaneswar
IIT Bombay
IIT Delhi
IIT Gandhinagar
IIT Guwahati
IIT Hyderabad
IIT Indore
IIT Jodhpur
IIT Kanpur
IIT Kharagpur
IIT Madras
IIT Mandi
IIT Patna
IIT Roorkee
IIT Ropar
NIT Kurukshetra
National Institute of Technology Calicut
Lakshadweep
NIT Delhi
Chandigarh
Delhi
NIT Agartala
nita.ac.in
NIT Durgapur
NIT Goa
Daman and Diu
Dadra and Nagar Haveli
NIT Puducherry
NIT Bhopal
Malaviya National Institute of Technology Jaipur
Motilal Nehru National Institute of Technology
NIT Manipur
NIT Meghalaya
NIT Mizoram
NIT Nagaland
Dr. B. R. Ambedkar National Institute of Technology Jalandhar
NIT Jamshedpur
Visvesvaraya National Institute of Technology
NIT Patna
NIT Raipur
NIT Rourkela
NIT Sikkim
NIT Silchar
NIT Srinagar
S V National Institute of Technology, Surat
NIT Karnataka
NIT Tiruchirappalli
NIT Uttarakhand
NIT Warangal
NIT Arunachal
NIT Hamirpur