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

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1.	Who reported that Down's syndrome is due to extra 21st chromosome [BVP 2000]
A.	J.L. Down (1866)
B.	Lejeune (1959)
C.	Kinefelter (1942)
D.	Huntington (1872)
Answer» B. Lejeune (1959)

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