I want to know that which is better Indian navy or Indian Air Force are better options after passing national defense academy examination

Both Indian navy and Indian Air Force are better options after passing national defense academy examination of UPSC /.. it is completely depends on your own interest and ability to choose between Navy or Air Force

If you are interested in traveling and an excitement career, meet new people and to enjoy the warmth & camaraderie than you should go for Indian Navy ..
On the other side if you are able to face Adventures , intellectual, thrilled and High quality life than you should go for Indian Air force,

Best Air Force Colleges in the country is as follows

Institute of Aeronautics and Engineering, Bhopal (Madhya Pradesh)
Institute of Aircraft maintenance Engineering (I.A.M.E.), Aurangabad (Maharashtra)
Indian Institute of Aeronautical Engineering, Dehradun (Uttarakhand)
Academy of Aviation and Engineering, Bangalore (Karnataka)
Buddha Institute of Aviation Technology, New Delhi (Delhi)
NDC Institute of Aircraft Maintenance Engineering (N.D.C.I.A.M.E), Vadodara (Gujarat)
Nehru College of Aeronautics and Applied Science, Coimbatore (Tamil Nadu)
Sha-Shib Flying Academy, Kolkata (West Bengal)
Utkal Aerospace and Engineering, Bhubaneshwar (Orissa)
Coimbatore Aeronautical College, Coimbatore (Tamil Nadu)
College of Aeronautics, Nagpur (Maharashtra)
Falcon Institute Of Aircraft Maintenance Engineers, Lucknow (Uttar Pradesh)
Flytech Aviation Academy, Secunderabad (Andhra Pradesh)
Hindustan Aerospace and Engineering, Pune (Maharashtra)
Hindustan Institute of Engineering Technology (H.I.E.T), Chennai (Tamil Nadu)
Indian Aerospace and Engineering, Navi Mumbai (Maharashtra)
Indraprasth Institute of Aeronautics, Gurgaon (Haryana)
Sai Flytech Aviation Pvt. Ltd., Bilaspur (Chhattisgarh)
Sha-Shib Aerospace Engineering, Guna (Madhya Pradesh)
Sha-Shib Aviation Academy, Kochi (Kerala)

Navy Colleges in India is as follows

Top colleges of merchant navy for admission:-

Institute of Technology & Marine Engineering (ITME)
(Kolkata, India)

B.P. Marine Academy
(Navi Mumbai, India)

Indian Meritime University (IMU)
(Chennai, India
Tolani Maritime Institute (TMI)
(Pune, India)

Samundra Institute of Maritime Studies- Mumbai
(Mumbai, India)

Samundra Institute of Maritime Studies- Mumbai
(Lonavala, India)

International Maritime Institute (IMI)
(Delhi/NCR, India)

Vels Academy of Maritime Studies
(Chennai, India)

Maharashtra Academy of Naval Education and Training (MANET)
(Pune, India)