Which of the phrases from the options (a), (b), (c) and (d) given below should replace the phrase printed in bold letters in the sentence to make the sentence grammatically correct? If the sentence is correct as it is, then choose “No correction required” as the answer.

Though I was keen on the film, I thought the music was beautiful.

Correct option is B

To make the sentence grammatically correct, the required change is “I was keen on the film” with “I was not keen on the film”. The sentence starts with “though” thus must have a contradictory statement.