Question

It was late night when Tarun heard a loud thumping sound on the
roof. It woke him up and his parents as well. He decided to complete the story

Answer 1

Answer:

I heard you won a gold trophy. I am extremely delighted.

c. I am extremely delighted to hear that you won a prize.

In this sentence :-

The options used didn't contain any and, but or so form, so the most appropriate option was used.

Had it been in case of A, then a comma has to be used to make the sentence correct which is not used.

In case of B, the sentence is incomplete. For what is he delighted, i.e the trophy is not mentioned.

D option, the verb heard is missing but the question doesn't permit to omit any word, hence, C part.