Hello 

Considering the job prospect, you will find good companies which offers job in chemical and metallurgy in almost all the states. However for biotech, you will have to relocate.

Also, based on bachelor degree you will job in chemical and metallurgy. However, in biotech if you have done masters from good institute or even further study then it will be in your favour to get good opportunities in industry.

Basically all the branches are best. I would recommend you to go for the one in which you have more interest.

Package of biotechnology and material engineering  on nit warangal is approx 12 lakhs per annum and 80% are placed . Placements are good in nit warangal .