Question

Match the following:

• A. A–1, B–2, C–3, D–4
• B. A–2, B–4, C–3, D–1
• C. A–3, B–4, C–2, D–1
• D. A–4, B–1, C–3, D–2

Hint:

Excretion occurs via multiple organs: lungs (CO\textsubscript{2}), liver (bile pigments), sweat glands (salts), sebaceous glands (lipid waste).

Answer 1

The Correct Option is B

Step 1: Understand excretory roles of organs.
Different organs in the human body help in excretion of different metabolic wastes such as gases, pigments, salts, and lipids.

Step 2: Match lungs (A).
Lungs remove carbon dioxide (CO\textsubscript{2}) along with a significant amount of water vapour during exhalation. Hence, A matches option (2).

Step 3: Match liver (B).
The liver converts decomposed haemoglobin from old RBCs into bile pigments such as bilirubin and biliverdin. Hence, B matches option (4).

Step 4: Match sweat glands (C).
Sweat glands help in excretion of excess NaCl, water, and lactic acid from the body. Hence, C matches option (3).

Step 5: Match sebaceous glands (D).
Sebaceous glands secrete sebum which contains sterols, waxes, and hydrocarbons. Hence, D matches option (1).

Step 6: Final verification.
Thus, the correct matching is A–2, B–4, C–3, D–1.