Choose the incorrectly spelt word.

Correct option is B

Option (b) is incorrectly spelt word.
Correct spelling is: Subsistence – the action or fact of maintaining or supporting oneself at a minimum level. (Hindi meaning: निर्वाह)
Example: Many farmers lived on mere subsistence farming.
Meanings of all the given options:
· (a) Benchmark: A standard or point of reference. (मानदंड)
· (c) Knight: A man awarded a non-hereditary title of honor. (योद्धा/वीर)
· (d) Aggravate: To make a problem or injury worse. (बिगाड़ना)
�� Parts of speech: "Subsistence" – Noun.