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Which statement correctly distinguishes Type-2 diabetes mellitus (NIDDM) from Type-1?
AIt accounts for only 10 to 20% of all diabetics
BPatients are usually underweight at the onset
CInsulin administration is always necessary here
DInsulin is produced but its action is impaired
Answer & Solution
Correct answer: D. Insulin is produced but its action is impaired
1. In Type-2 (NIDDM), the pancreas makes insulin normally, but target cells do not respond, so glucose cannot enter cells.
2. Type-2 accounts for 80-90% of diabetics, occurs mainly in obese adults, and is controlled by diet, exercise and medicine.
3. Options A, B and C actually describe Type-1, making them traps.
4. Hence the answer is D.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Health and Diseases", p.313_
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