Hello Priyanshu,
According to me the you should opt for Jharkhand polytechnic, it is better than bihar polytechnic. And firstly opting before for polytechnic you should be confirmed about taking your field, college will not matter but your interest will, if you are interested in your field you will do your best. The most important thing that is required is your interests in subjects. First check yourself, your interests and finally make up your mind for your interests and choose whatever college you want because every College gives almost same education it's upon the students who work hard. Give your best in your education. You should first see in which subjects you are best and what are your interests and goals. It doesn't matter in which college you take admission ranking of colleges is based upon the students i.e. how many merit students are studying. And according to merit lists Jharkhand polytechnic is better. Work for yourself, it is of no use if you take admission in best colleges and you don't have interest in your stream, be focused for your goals and do your best in whatever you choose you will definitely be successful if you are determined no matter in which college you study. You must first think before taking admission in any college because this is the only time when you could think otherwise you will regret for your decision.I hope you will first think upon for some time before taking any decision. And you will focus towards your goals to be successful in future. All the best for your future.

Bihar polytechnic college is a good college it has good faculty and dedicated placement cell but you should go for b. Tech lateral entry after polytechnic rather than going for job
The college is pioneer in polytechnic and jharkhand polytechnic is relatively new with less history and alumni