A) \[{{\text{I}}_{\text{2}}}\]
B) K
C) Na
D) Cl
Correct Answer: A
Solution :
Metamorphosis is the phenomenon of events through which a herbivorous tadpole is convened into an adult carnivorous frog. The metamorphosis of frog is controlled by the thyroid hormones that contains iodine element. Thus, addition of I2 element in water speed up the metamorphosis in frog tadpole.
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