HomeSSCWhich among the following is a main component of some alert tablets such as Alert, No Doz, Stay Awake & Vivarin? Which among the following is a main component of some alert tablets such as Alert, No Doz, Stay Awake & Vivarin?By Admin / October 4, 2025 A. Thein B. Caffeine C. Nicotine D. catechins ✅ The correct answer is option B.