Identify the grammatically correct sentence:

GATE · 2025 · AR · General AptitudeGATE · 2025 · ME · General AptitudeGATE · 2025 · PE · General Aptitude

1. A.

   It is I who am responsible for this fiasco.

2. B.

   It is myself who is responsible for this fiasco.

3. C.

   It is I who is responsible for this fiasco.

4. D.

   It is I who are responsible for this fiasco.

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