Identify the segment in the sentence that contains a grammatical error.
I immediately realised that my deductions had being all wrong.

Correct option is D

The incorrect segment is "had being."
Explanation:
· "Being" is the present participle (V4) form and cannot be used after "had" (past perfect auxiliary verb).
· The correct verb should be "been" (past participle, V3).
Correct Sentence: I immediately realised that my deductions had been all wrong.
Grammatical Rule Used:
· "Had" is always followed by a past participle (V3) verb in past perfect tense.
· "Being" is a present participle (V4) and cannot be used in past perfect tense.
Explanation in Hindi:
· Past Perfect Tense में "had" के बाद हमेशा "been" (V3) आता है।
· "Being" (V4) का उपयोग यहाँ गलत है।
· सही वाक्य: "had been all wrong."