Amongst Civil, Pharmacy and Biotech, Biotech is one of the best! You will find many job opportunities in Biotech. It is also evolving in India.
About civil, there are many many and many of them who are civil Engineers and so job opportunities are limited due to excess aspirants.

Dear Saravanakumar,

Both these fields vary widely in thier study,work and research  areas. Civil engineering is an evergreen engineering branch where you get to work with construction sites, construction of buildings, dams,etc. You also get to study about environmental engineering. Biotechnology, on the other hand, is a fast growing sector in India. It has immense scope abroad. There are various types of biotechnology like in agriculture, marine, medical, etc. Pharmacy sector is also a very good sector if you are interested in medicine and want to work, study about medical devices,instruments, tablets, etc.