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Common-sense Concave mirror is used in headlights of vehicles, because it a) is cheaper than other mirrors b) fits well into the shape of the headlight c) sends parallel rays d) focuses light from the bulb onto nearby vehicles Term Dissection The term Probiotic is applied to a) Antacid b) Antibiotic c) Organic food d) Live microbial food supplement Term Investigation Light Year is a measure of a) Time b) Total amt of light falling on the Earth in a year c) Day-time in a year d) Distance Term Independent/Exposure-based/Parenting-based Which one of the following vitamin has a role in blood clotting? a) Vitamin A b) Vitamin D c) Vitamin E d) Vitamin K Calculation-cum-Exposure based How long does light take to reach the Earth from the Sun? a) about 1 year b) about 2 seconds c) about 8 minutes d) about 8 days [the quizzer assumes you know the distance between sun and earth, speed of light, and that time is distance divided speed] A vendor bought toff