Correct answer: A. Mahatma Gandhi
Explanation: The direct answer is A: Mahatma Gandhi. Hriday Kunj was the simple residence associated with Mahatma Gandhi during his time at Sabarmati Ashram. To reason step by step, identify the monument as part of Sabarmati Ashram, recall that the ashram was closely connected with Gandhi’s life and work, and then connect Hriday Kunj with his daily living space. Option A is correct. Option B, Bhagat Singh, was a revolutionary associated with a different phase and set of places, not Hriday Kunj. Option C, Subhas Chandra Bose, led important nationalist activities but was not the resident connected with this building. Option D, Lala Lajpat Rai, was another major freedom fighter, but Hriday Kunj was not his daily residence. The association does not mean Gandhi alone led the entire freedom movement; it identifies the person linked to this particular place. Exam cue: Sabarmati Ashram, Hriday Kunj, Gandhi, and the Dandi March form a useful memory group.