Select the most appropriate ‘one word’ for the expression given below.
The act of formally requiring or calling upon someone to perform an action.

Correct option is A

The correct one-word substitution is (a) Requisition.

Given expression – The act of formally requiring or calling upon someone to perform an action:

• This refers to an official demand or formal request made by authority.

Correct answer word – Requisition:

• Meaning: An official demand or request for something or for someone’s services. (Hindi meaning: आधिकारिक मांग / आदेश)
• Example: The hospital sent a requisition for additional medical supplies.

Meanings of all the other given options:

• Conundrum – A confusing and difficult problem (पहेली/दुविधा).
• Persuation – Incorrect spelling; the correct word is “persuasion” (मनाना/प्रेरणा).
• Dramatics – The art of drama/acting (नाट्य कला); unrelated to formal requirement.

So the correct answer is (a)