Match the following:

List I (Landform Type)	List II (Location)
(A) Mariana Trench	(1) Atlantic Ocean
(B) Sunda Trench	(2) Arabian Sea
(C) Puerto Rico	(3) Indian Ocean
(D) Carlsberg Ridge	(4) West-Pacific Ocean

Consider the following statements:
1. Island arcs are generally concave towards the open ocean.
2. Island arcs run parallel to ocean trenches and mountain chains.

Which of the statements given above is/are true?