Official Answer Key & Detailed Solution
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Correct Answer: Option (A) — Caffeine
Concept & Option Breakdown
Standard Reference VerifiedColas and various carbonated soft drinks contain significant amounts of caffeine, a central nervous system stimulant added for its characteristic bitter flavor profile and stimulating effect.
Nicotine is in tobacco, tannins are in tea and wine, and renin is a kidney enzyme; caffeine is the standard additive in cola beverages.
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