hi,

well congrats on your achievement. you have got really good institute as per your wbjee ranking. for college ranking jadavpur university considered is best for engineering and best institute in west bengal. now coming to stream and job prospect in future, computer science is more lucrative and have many opportunities in todays industry in different sectors like development, research, eCommerce etc . so if we compare between two stream I would recommend to cse over power engineering.

kalyani government engineering college has good placement records  and quality of education. the major recruiter is tcs, cognizant.

hope it helps.