Find out which part of a sentence has an error.

Correct option is A

Option (a) contains an error.
The phrase "Each in the office" is incorrect. It should be "Each one in the office" or "Everyone in the office". The word "Each" is a distributive pronoun and should be followed by a singular noun or pronoun to complete the meaning.
Grammatical rule used: Distributive pronouns like each, every, and either refer to individual members of a group separately, and they require a singular noun or pronoun after them. For clarity, "each" should be followed by a singular noun, e.g., each person, each one.
Example:
· Each one in the office, including Rajesh, knew who had made the mistake.
Explanation of the grammatical rule in Hindi: Distributive pronouns जैसे each, every, either समूह के हर सदस्य को अलग-अलग संदर्भित करते हैं और इनके बाद हमेशा singular noun या pronoun का प्रयोग होता है।
उदाहरण के लिए:
· Each one, each person, each student आदि।
· सही वाक्य होगा: "Each one in the office"।