AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Option B — Five years.
Indian indentured labourers were hired under contracts which promised return travel to India after working five years on their employer's plantation.
Source: Chapter 3, Section 2.4 — Indentured Labour Migration from India
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The passage explicitly states: "indentured labourers were hired under contracts which promised return travel to India after they had worked five years on their employer's plantation." This is a direct fact-based MCQ — no inference needed. Just recall the exact figure from the text.