Hey Samarth, if you are a science student then you can opt for almost any branch available for studying.

But if you are looking for jobs related to science field then you can go for research work on some topic related to your interest. For doing so you should first do B.Sc and then M.Sc in your subject fo interest and then PhD with the topic you are most interested in you can then continue with your research work and discover or invent something that can get you fame.

For more information about the jobs for a PCM guy other than engineering you can visit the link below:

https://www.mindler.com/blog/pcm-career-options/

Engineering is one of the most pursued course after studying PCM .There are many other courses with high salary packages apart from this after completing your PCM course .You might apply for national level entrance tests of different courses like Merchant navy with almost very high package ,then comes commercial pilot for which again you would need to crack the entrance test ,and bachelor of architecture and bachelor of sciences could also be taken according to individual interests.

Thank you!