`Na^(+) and CI^(-)` both are removed by
(a) Ascending limb of Henle 's loop
(b) Proximal convoluted tubule
(c) Both a and b
(d) Descending limb of Henle's loop

Options

A. Ascending limb of Henle 's loop
B. Proximal convoluted tubule
C. Both (1) and (2)
D. Descending limb of Henle's loop

Answer

To solve the question regarding the removal of sodium ions (Na⁺) and chloride ions (Cl⁻) in the nephron, we will analyze the functions of the different parts of the nephron mentioned in the options.

### Step-by-Step Solution:

1. **Understanding the Nephron Structure**:
The nephron consists of various parts including the proximal convoluted tubule (PCT), the loop of Henle (which has ascending and descending limbs), and the distal convoluted tubule. Each part has specific functions related to the reabsorption of different substances.

2. **Analyzing the Ascending Limb of Henle's Loop**:
- The ascending limb of the loop of Henle is known to be impermeable to water.
- It plays a crucial role in the reabsorption of sodium ions (Na⁺) and chloride ions (Cl⁻).
- Therefore, this part of the nephron does remove both Na⁺ and Cl⁻.

3. **Analyzing the Proximal Convoluted Tubule (PCT)**:
- The PCT is responsible for the reabsorption of a significant amount of sodium and chloride ions.
- It also reabsorbs bicarbonate (HCO₃⁻), water, potassium ions (K⁺), and nutrients like glucose.
- Hence, the PCT also removes both Na⁺ and Cl⁻.

4. **Analyzing the Descending Limb of Henle's Loop**:
- The descending limb of the loop of Henle is permeable to water but impermeable to electrolytes, including sodium and chloride ions.
- Therefore, this part does not contribute to the removal of Na⁺ and Cl⁻.

5. **Conclusion**:
- Since both the ascending limb of Henle's loop and the proximal convoluted tubule are involved in the removal of sodium and chloride ions, the correct answer is option (c) Both A and B.

### Final Answer:
(c) Both A and B

---