Answer: Option (A)
Explanation: A volcano when undergoes cooling mechanism, it forms a crust. This crust then initiates motion due to the tectonic activities. This plates when undergoes compression in the convergent plate boundary, then it forms mountains or mountain ranges that are highly folded because of the converging forces that acts from both the sides.
This is how crust forms from the crystallization of magma and gradually leads to the formation of mountains at the convergent plate boundary.
Thus, the correct answer is option (A).