Which one of the following is most prone to earthquakes?
The earthquakes are more prone to this belt of the young fold mountain because they are made of weak sedimentary rocks. They are easy to fold due to their softness. So, the chances of tectonic movement become more prevalent. There are more hazardous of earthquakes in such regions.
So the above information shows that Young folded mountains are most prone to earthquakes. Thus correct options are D. Other options are not suitable.