Which hormonal deficiency is responsible for the following (i) Diabetes mellitus (ii) Goitre (iii) Cretinism

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(i) Diabetes mellitus is due to deficiency of insulin.
(ii) Gbitre is due to deficiency of thyroxine ($T_4$ ) and triiodothyronine ($T_3$).
(iii) Cretinism is due to deficiency of thyroxine hormone.