Four words are given, out of which only one word is spelt correctly. Choose the correctly spelt word.

Correct option is A

The correctly spelt word is (a) OCCURRENCE.

Correct word – OCCURRENCE: It means an event or something that happens. (Hindi meaning: घटना)
Example: The occurrence of heavy rainfall caused flooding in the city.

Meanings of all the other given options:
OCURRENCE – Incorrect spelling (गलत वर्तनी)
OCCURRANCE – Incorrect spelling (गलत वर्तनी)
OCCURRENSE – Incorrect spelling (गलत वर्तनी)

So the correct answer is (a).