Mongoloid idiocy in humans is also known as

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Mongoloid idiocy in humans is also known as

1. Tay Sachs disease
2. Klinefelter's syndrome
3. Down's Syndrome
4. Turner's Syndrome

Correct Option: C

Downs syndrome develops due to trisomy of the 21^st chromosome. Affected individual possess a characteristic appearance. They have short stature, small round heads, broad forehead, open mouth and projecting lower lip (Mongoloid idiocy).