Who reported that Down's syndrome is due...

Who reported that Down's syndrome is due to extra 21st chromosome

A

J.L. Down (1866)

B

Lejeune (1959)

C

Kinefelter (1942)

D

Huntington (1872)

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The correct Answer is:

A

Down syndrome was discovered Langdon Down in 1866. It is a chromosomal disorder due to trisomy at chromosome 21.

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