In sickle cell anemia there is substitution of_________________?

A.\tValine for glutamic acid at the sixth position of beta chainCorrect Answer

B.\tPhenylalanine for glutamic acid

C.\tTyrosine for valine at the 6th position at beta chain

D.\tAll of the above

Correct Option: A.\tValine for glutamic acid at the sixth position of beta chain

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