The largest thorium reserves in the world are in

India holds the world's largest thorium reserves, mostly in the monazite sands along its southern coasts.

The USA has notable reserves but far less than India's monazite deposits.

Australia is rich in many minerals yet does not lead in thorium.

Since India clearly tops the list, none-of-these does not apply.

Kerala and Tamil Nadu beach sands are especially rich in monazite.

This underpins India's three-stage nuclear programme that aims to use thorium.