These are emerging fields and yet to establish a mark, CSE is alltym evergreen branch with loads of opportunities and has potential to create millions of jobs.

Dear Samyadeep
As Vikram said that by opting these options, you can't have a good scope but you have satisfied scope in future. My option is choose the branch based on your passion then go with that. If that don't have any scope, how would the colleges are running that course. Everything makes sense when you dig deep.
All the best. Choose wise decision.

Dear

Every Engineering branch having own value and job market but these fields now days very limited opportunities in India and job market is not very open to these fields .Leather Engineering you may consider from USA or France for better opportunities and knowledge.

All the best