Select the most appropriate option to substitute the highlighted segment in the given sentence.
Did you do what I telling you to do yesterday?

Correct option is A

The correct substitution of the highlighted words is (a) what I told you.
Explanation: The phrase “I telling you” is grammatically incorrect as it lacks an auxiliary verb and the tense is inconsistent with “yesterday”. The sentence refers to a past action, so the verb should be in simple past tense. “What I told you” correctly maintains this past reference.
Grammatical rule used: When reporting past actions, the simple past tense is used, especially if a specific time reference (e.g., "yesterday") is given.
Example: He did what I told him yesterday.
Information Booster: Present continuous (“I am telling”) and present perfect (“I have told”) cannot be used with specific past time expressions like “yesterday”.