Any Hindu male who is not insane & is not a minor is eligible to adopt a son or daughter. However, suppose he has a live wife; in that case, he shall not adopt without her agreement unless his wife has totally and finally forsaken the world, or has ceased to be a Hindu, or has been certified of unsound mind according to a court of competent jurisdiction.

https://www.onlinelegalindia.c....om/blogs/the-adoptio