Cretinism is produced when one of the following is deficient

Options

A. Adrenaline
B. Growth hormone
C. Parathormone
D. Thyroxine.

Answer

### Step-by-Step Solution:

1. **Understanding Cretinism**: Cretinism is a condition that affects physical and mental development in children. It is primarily associated with a deficiency in certain hormones.

2. **Identifying the Hormone**: The hormone in question is related to the thyroid gland. The thyroid gland produces hormones that are crucial for growth and development.

3. **Role of Iodine**: The production of thyroid hormones, particularly thyroxine (T4), requires iodine. Thus, iodine is essential for the synthesis of these hormones.

4. **Consequences of Iodine Deficiency**: When there is a deficiency of iodine, the thyroid gland cannot produce enough thyroxine. This leads to a condition known as hypothyroidism.

5. **Effects of Hypothyroidism**: Hypothyroidism in infants and children can result in defective development and maturation, leading to stunted growth and other developmental issues.

6. **Conclusion**: Therefore, the deficiency of iodine leads to low secretion of thyroid hormones, resulting in cretinism.

### Final Answer:
Cretinism is produced when there is a deficiency of iodine.

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