Inherited property sold by son still grandson has the rights

You have posted that:

"It's an inherited property sold by son to third party 30 years back, still the son is alive ,my question is still grandson can go and claim the sold property. What if grandsons are minor while selling the property by son and what if they are major."

Assuming that the grandson was born on the date of sale of the property i.e. 30 years back, he would be 30 years now i.e he attained majority 12 years back.

Why doesn't he ask his father to make good for his loss, if any?

What is the opinion of your own counsel?

Inherited property can be sold by son. In this case it was sold 30 years ago. The children cannot claim anything out of it.  It would have gone to children had the son, not sold it and died.