Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Mental retardation is commonly associated with genetic disease as, but it is not related with one of the genetic defect - Sarthaks eConnect
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Mental retardation is commonly associated with genetic disease as, but it is not related with one of the genetic defect :

A.

trisomy 21

B.

phenylalanine hydroxylase

C.

myelinisatio of neuron

D.

Y–chromosome