MCQ
Sound becomes hazardous noise pollution at level.
- AAbove $30\ dB.$
- ✓Above $80\ dB.$
- CAbove $100\ dB.$
- DAbove $120\ dB.$
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$I.$ Haemophilia is a sex-linked recessive disease
$II.$ Down's syndrome is due to aneuploidy
$III.$ Phenylketonuria is an autosomal dominant gene disorder
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