Select the most appropriate word to fill in the blank.
The marking of answer papers is ______ out by the course teacher.

Correct option is B

The correct option to fill in the blank is (b) carried.

Explanation: The phrase "carried out" is a standard phrasal verb meaning "performed" or "executed", and fits best here. (किया जाना)
Example: The research was carried out by a team of scientists.

Explain why other options are incorrect:
· (a) done – General verb; not idiomatic here. (किया गया)
· (c) checked – Suggests only verification, not full execution. (जांच किया)
· (d) crossed – Incorrect context; unrelated meaning. (लांघा/काटा)