Cretinism, mental retardation low intelligence quotient, abnormal skin, and deaf-mutism are the results of–

The correct option is C Hypothyroidism
Hypothyroidism during pregnancy causes defective development and maturation of the growing baby leading to stunted growth (cretinism), mental retardation, low intelligence
quotient, abnormal skin, deaf-mutism, etc. In adult women, hypothyroidism may cause menstrual cycle to become irregular.

Hyperthyroidism results from the overproduction of thyroid hormone resulting in butterfly shaped gland in the neck. Goitre occurs due to hyperthyroidism.

So, the correct answer is- hypothyroidism.