Which of the following statemens is/are false about columnar epithelium ?
(i) It is made of tall and slender cells
(ii) Free surface may have microvilli
(iii) They are found in stomach and intestine and help in secretion and absorption
(iv) Cillated epithelium is mainly present in hollow structures like bronchioles and Fallopian tubes.
(v) They have apical nuclei.

Options

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

Explanation

To determine which statements about columnar epithelium are false, let's analyze each statement one by one:

1. **Statement (i): It is made of tall and slender cells.**
- This statement is **true**. Columnar epithelium consists of tall and slender cells.

2. **Statement (ii): Free surface may have microvilli.**
- This statement is also **true**. The free surface of columnar epithelium can have microvilli, which increase the surface area for absorption, particularly in areas like the proximal convoluted tubule (PCT) of the kidney.

3. **Statement (iii): They are found in stomach and intestine and help in secretion and absorption.**
- This statement is **true**. Columnar epithelium is indeed found in the stomach and intestines, where it plays a role in both secretion and absorption.

4. **Statement (iv): Ciliated epithelium is mainly present in hollow structures like bronchioles and Fallopian tubes.**
- This statement is **true**. Ciliated columnar epithelium is found in structures such as bronchioles and Fallopian tubes, where the cilia help in moving substances along the surface.

5. **Statement (v): They have apical nuclei.**
- This statement is **false**. In columnar epithelium, the nuclei are typically located at the basal end of the cells, not at the apical surface.

**Conclusion:**
The false statement regarding columnar epithelium is **(v) They have apical nuclei.**