' \( X \) ' is secreted when calcium level is high in the blood and it lowers the calcium level ...

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' \( X \) ' is secreted when calcium level is high in the blood and it lowers the calcium level by suppressing release of calcium ions from the bones. Whereas, ' \( Y \) ' mobilises the release of calcium into the blood from the bones and it increases calcium absorption from the intestine.
Which of the following is a disorder of ' \( \mathrm{Y} \) '?
(A) Hashimoto's disease
(B) Cushing's syndrome
(C) Parathyroid tetany
(D) Acromegaly
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