Fill in the blank with the most appropriate option.
I would have waited for you ______ you were coming.

Correct option is A

The correct option to fill in the blank is (a) had I known.
Explanation: This sentence is a classic example of a third conditional sentence, used to express unreal or hypothetical situations in the past. Instead of using the full structure “If I had known…”, the sentence uses inversion for a more formal style: “Had I known…” which means the same as “If I had known”.
(Hindi meaning – अगर मुझे पता होता...)
Example: Had I known about the meeting, I would have attended it.
Grammatical Rule Used:
· Third conditional structure:
· If + past perfect, would have + past participle
· Inversion for formal tone: Had + subject + past participle instead of using “If”
Why other options are incorrect:
· (b) because I was knowing: Continuous form of stative verb “know” is grammatically incorrect. (was knowing – गलत प्रयोग)
· (c) when it was known: Incorrect tense and structure for a conditional sentence. (जब यह जाना गया था – गलत अर्थ और अनुचित प्रयोग)
· (d) if I would have known: Double use of “would” is incorrect in conditional clauses. (गलत संरचना)