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O-LevelBiologyRespiration5090/11 · Oct/Nov 2012 · Q251 Mark

Which component of tobacco smoke may cause lung cancer?

Acarbon dioxide

Bcarbon monoxide

Cnicotine

Dtar

✓ Correct answer

D: tar

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About this question

Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2012 Paper 1 Variant 1, question 25.

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