Select the option that will improve the highlighted part of the given sentence.
It is I who am responsible for the success of the organisation.

Correct option is A

The correct substitution of the highlighted words is (a) No improvement required.
Explanation: The sentence "It is I who am responsible..." is grammatically correct. After "It is I," the relative clause "who am" must agree with "I" (the subject).
Therefore, "I" is the correct subjective pronoun and "am" matches it in verb form.
Grammatical rule used:
�� When the subject of the relative clause refers to “I,” the verb must agree in the first person (i.e., “am”).
Example: It is I who am at fault.
�� Info booster: In formal English, “It is I” is correct. Though “It’s me” is common in conversation, exams favor grammatical correctness.