Which course has a better scope, BBA, BBM or BHM? Should I pursue B.Tech?

The decision depends a lot on your interest areas and career aspirations. BBA/BBM are generic courses covering business management areas. BHM is a specialist course in hotel management field. B.Tech is a technical course in engineering field.

B.Tech has more opportunities as compared to others. Opportunities varies from the field of computers to agriculture. As technology is changing rapidly you can look for some upcoming streams in B.Tech like Data Sciences, Nano Technology and Financial Engineering.