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Why is cell-phone radiation considered more harmful for children than for adults?
AIt penetrates the bones of children more effectively
BChildren hold the phone closer to their feet
CChildren's phones emit a brighter screen light
DChildren always use phones in total darkness
Answer & Solution
Correct answer: A. It penetrates the bones of children more effectively
1. The chapter lists physical problems from cell-phone radiation such as headache, insomnia and joint pain.
2. It adds the more serious fact that the radiation penetrates children's bones more effectively than adults' bones.
3. Option A states this reason.
4. The other options invent causes (feet, screen light, darkness) not given in the text.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 9 "Social Health", p.113_
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