B.Sc

BCA is a better choice as compared to B.Sc IT.
BCA does have lots of further options in higher studies and as well as lots of job preferences.
Hope it helps.
Good luck.

You well know that Engineer at a reputed PSU have more powers in comparison with the Bank PO. Not only power but the money too. Your life would become still and monotonous if you go for Bank PO while in the other case, you never know what you explore in the process.

Some of the colleges are:
Fergusson College, Pune
M.E.S. Abasaheb Garware College, Pune
Sinhgad College of Science - [SCOS] Ambegaon, Pune
Modern College Of Arts Science and Commerce - [MCASC] Shivajinagar, Pune
DR. D.Y. Patil Arts, Science and Commerce College Pimpri, Pune
Bharati Vidyapeeth University - [BVU], Pune
PES'S Modern College of Arts, Science and Commerce Ganeshkhind, Pune
Institute Of Bioinformatics and Biotechnology - [IBB], PUNE
Vidya Pratishthan's School of Biotechnology Baramati, Pune
Rajiv Gandhi Institute of Information Technology and Biotechnology - [RGITBT], Pune
Nowrosjee Wadia College, Pune

Try to go for a professional B.Sc course rather than B.Sc in PCM/ life sciences. Though chemistry hons. is also a decent option.

My advice is, you may go for national institute for solar energy, national power training institute, or specialization in solar energy from reputed institutions.

1.AMET University
No. 135, East Coast Road, Kanathur
Chennai, Tamil Nadu
2.Indian Maritime University - Chennai Campus
East Coast Road Uthandi
Chennai, Tamil Nadu
3.International Maritime Academy - IMA
No. 41, Jamin Korattur, Pudhuchatram, (From Poonamallee to Tirupathi Highway Road)
Chennai, Tamil Nadu
4.Southern Academy of Maritime Studies - SAMS
No.82, Panapakkam, Chennai Tirupathi Road, Uthukottai Taluk, Near Periyapalayam
Chennai, Tamil Nadu