The correct answer is: D. No error
The sentence “An Indian ship laden with merchandise got drowned in the Pacific Ocean” is grammatically correct. The word “laden” is an adjective that means “loaded or filled with something.” In this sentence, it is used to describe the ship, which is loaded with merchandise. The word “drowned” is a verb that means “to die by being submerged in water.” In this sentence, it is used to describe the ship, which sank in the Pacific Ocean.
The sentence is clear and concise, and it conveys the intended meaning accurately. There are no grammatical errors in the sentence.