Look at the underlined/bold part in this question. Below in this question there are  three possible substitutions are given for the underlined/bold part. If one of them, i.e., (a), (b) or (c) is better than the underlined/bold part, indicate your response on the Answer Sheet against the corresponding letter. If none of the substitutions improves the sentence, indicate (d) as your response on the Answer Sheet.

I don’t remember exactly when did I go to Simla last year.

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