AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
C — Smallpox
The most deadly weapon of the Spanish conquerors was the germ of smallpox. America's original inhabitants had no immunity against it, and it killed and decimated whole communities.
Source: Chapter 3, Section 1.3 — Conquest, Disease and Trade
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The passage explicitly states: "the most powerful weapon of the Spanish conquerors was not a conventional military weapon at all. It was the germs such as those of smallpox." Examiners expect you to recall this specific disease. In MCQs, always justify briefly if space allows — it reinforces your answer and avoids mark loss due to ambiguity.