(A) Chlorine (X)
(B) Iron ()
(C) Calcium (X)
(D) None of these (X)
Answers: The main constituent of hemoglobin is Iron.
(A) Chlorine (X)
(B) Iron ()
(C) Calcium (X)
(D) None of these (X)
Answers: The main constituent of hemoglobin is Iron.
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