Each question consists of a sentence which is divided into four parts. Only one part in each sentence is not acceptable in standard written English Identify that part which contains an error.

Correct option is C

Option (c) contains an error.
· Explanation: The correct word is extensive, not extensible. Extensive means having a wide range, whereas extensible means capable of being extended, which is incorrect here.
· Correct sentence: The vacancy was filled by a young scholar who had an extensive knowledge of ancient art.
Grammatical rule used: Correct vocabulary usage based on context.
· Explanation in Hindi: यहाँ "extensive" का अर्थ है "व्यापक ज्ञान," जो वाक्य में उचित है। "Extensible" का अर्थ "फैलने योग्य" होता है, जो यहाँ गलत है।