Which of the following statement is correct?
(i) Sweat is waxy protective secretion having sterols,
hydrocarbons and fatty acids
(ii) Sebum is an aqueous fluid having NaCl, lactic acid, urea, amino acids, glucose
(iii) The human skin posseses sweat and sebaceous glands which eliminate some wastes in their secretion.

Options

A. Only iii
B. Only i
C. i and ii
D. i and iii

Answer

To determine which of the statements is correct, let's analyze each one step by step.

**Step 1: Analyze the first statement**
- The first statement claims that "sweat is a waxy protective secretion having sterols, hydrocarbons, and fatty acids."
- This statement is incorrect because sweat is not waxy; it is primarily a watery secretion produced by sweat glands. It mainly consists of water, salts (like NaCl), and small amounts of waste products such as urea and lactic acid.

**Step 2: Analyze the second statement**
- The second statement asserts that "sebum is an aqueous fluid having NaCl, lactic acid, urea, amino acids, glucose."
- This statement is also incorrect because sebum is not an aqueous fluid; it is a waxy substance secreted by sebaceous glands. Sebum contains hydrocarbons, sterols, and fatty acids, but it does not contain significant amounts of the components listed in the statement.

**Step 3: Analyze the third statement**
- The third statement states that "the human skin possesses sweat and sebaceous glands which eliminate some wastes in their secretion."
- This statement is correct. Both sweat glands and sebaceous glands are present in human skin, and they do contribute to the elimination of some waste products. Sweat helps in regulating body temperature and excreting waste, while sebum primarily provides a protective layer for the skin.

**Conclusion:**
- After analyzing all three statements, the only correct statement is the third one: "the human skin possesses sweat and sebaceous glands which eliminate some wastes in their secretion."

**Final Answer:**
The correct statement is (iii) The human skin possesses sweat and sebaceous glands which eliminate some wastes in their secretion.

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