Read the given paragraph, where few words have been italicised.
The pineal gland secretes a hormone progesterone which helps to regulate sleep pattern. Thyroid gland release hormone which regulate the level of calcium in the blood. This hormone opposes the effect of calcitonin which is produced in the parathyroid gland.
Select the correct statements regarding the given paragraph.
(i) Positions of pineal gland and parathyroid glands should be interchanged.
(ii)Progesterone should be replaced by melatonin.
(iii) Parathyroid glands should not be replaced as it is correctly mentioned.
(iv) Positions of progesterone and calcitonin should be interchanged.
(v) Positions of thyroid gland and parathyroid glands should be interchanged.

Options

A. (ii) and (v) only
B. (i), (ii) and (v) only
C. (i) and (iii) only
D. (ii) and (iv) only

Explanation

**Step-by-Step Solution:**

1. **Identify the glands and hormones mentioned in the paragraph:**
- The paragraph mentions the pineal gland, thyroid gland, parathyroid gland, progesterone, calcitonin, and melatonin.

2. **Analyze the functions of the glands and hormones:**
- The pineal gland is responsible for secreting melatonin, which regulates sleep patterns.
- The thyroid gland releases thyroid hormones, which are involved in metabolism and do not regulate calcium levels.
- The parathyroid gland releases parathyroid hormone (PTH), which regulates calcium levels in the blood.
- Calcitonin is produced by the thyroid gland and works to lower blood calcium levels, opposing the action of PTH.

3. **Evaluate the statements provided:**
- (i) Positions of pineal gland and parathyroid glands should be interchanged. **(Incorrect)** - Their positions are correctly stated.
- (ii) Progesterone should be replaced by melatonin. **(Correct)** - The pineal gland secretes melatonin, not progesterone.
- (iii) Parathyroid glands should not be replaced as it is correctly mentioned. **(Correct)** - The mention of the parathyroid gland is accurate.
- (iv) Positions of progesterone and calcitonin should be interchanged. **(Incorrect)** - Progesterone is not related to the thyroid or parathyroid glands.
- (v) Positions of thyroid gland and parathyroid glands should be interchanged. **(Incorrect)** - Their positions are correctly stated.

4. **Summarize the correct statements:**
- The correct statements are (ii) and (iii).

5. **Final Answer:**
- The correct statements regarding the given paragraph are (ii) and (iii).

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