A college counsellor lists four students who may be at risk of suicid…

The correct answer is Option (1) → Chetan, who attempted suicide a year ago

Option (1) Chetan, who attempted suicide a year ago — Correct. Chetan has made an earlier attempt. A previous suicidal attempt is the strongest risk factor for suicide.

Option (2) Bela, whose village was hit by a flood last year — Incorrect. Bela went through a natural disaster, which raises suicide risk. Still, it is not the strongest risk factor.

Option (3) Amit, who was bullied and abused by seniors in his hostel — Incorrect. Amit faces violence and abuse, a real risk factor for suicide. But it is one of several such factors, not the strongest.

Option (4) Deepa, who lives alone, far from her family — Incorrect. Deepa's isolation is a risk factor at any stage of life. It is weaker than a past attempt.