Which of the following statements is correct ?

Options

A. In an adult woman, hypothyroidism may cause irregular menstrual cycle
B. Hyperthyroidism may be resulted due to thyroid cancer or nodules development in the thyroid glands
C. Deficiency of iodine in our diet results in hypothyroidism
D. All

Answer

To determine which statement is correct regarding hypothyroidism, we need to analyze the information provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Understanding Hypothyroidism**:
- Hypothyroidism is a condition where the thyroid gland does not produce enough thyroid hormones. This can lead to various symptoms and health issues.

2. **Effects on Menstrual Cycle**:
- The transcript mentions that in an adult woman, hypothyroidism may cause an irregular menstrual cycle. This is a correct statement, as thyroid hormones play a crucial role in regulating menstrual cycles.

3. **Causes of Hypothyroidism**:
- The transcript states that hypothyroidism may result from thyroid cancer, nodules, or developmental issues in the thyroid gland. This is also true, as these conditions can impair the thyroid's ability to produce hormones.

4. **Exophthalmic Goiter and Graves' Disease**:
- The transcript incorrectly associates exophthalmic goiter with hypothyroidism. Exophthalmic goiter is actually associated with hyperthyroidism, specifically Graves' disease. Therefore, this part of the statement is incorrect.

5. **Iodine Deficiency**:
- The transcript mentions that iodine deficiency can lead to hypothyroidism, which is accurate. Iodine is essential for the synthesis of thyroid hormones, and its deficiency can result in hypothyroidism.

6. **Ayurvedic Hormone Reference**:
- The mention of "Ayurvedic hormone" in relation to hypothyroidism seems to be a misunderstanding or miscommunication. Hypothyroidism is a medical condition, not a hormone.

### Conclusion:
Based on the analysis, the correct statement is that hypothyroidism may cause irregular menstrual cycles in adult women, and it can also be caused by iodine deficiency.