Read the following matches regarding the placentation
(i) Argemone - Axile
(ii) China rose - Free central
(iii) Lemon - Axile
(iv) Mustard - Parietal
Which of these are correct ?

Options

A. i and ii only
B. i and ii only
C. ii only
D. iv only

Answer

To solve the question regarding the correct matches of placentation for the given plants, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Argemone - Axile**
- Argemone actually exhibits parietal placentation, not axile. In axile placentation, the ovules are attached to the central axis of the ovary, which is not the case for Argemone. Therefore, this match is **incorrect**.

2. **China Rose - Free Central**
- China rose (Hibiscus rosa-sinensis) does not have free central placentation. Instead, it has marginal placentation. Free central placentation occurs when the ovules are attached to a central column, which is not applicable here. Thus, this match is **incorrect**.

3. **Lemon - Axile**
- Lemon (Citrus limon) has parietal placentation, not axile. In axile placentation, the ovules are attached to the central axis, which does not describe the structure of the lemon ovary. Therefore, this match is also **incorrect**.

4. **Mustard - Parietal**
- Mustard (Brassica) does indeed have parietal placentation. In this type, the ovules are attached to the walls of the ovary. This match is **correct**.

### Conclusion:
After analyzing all the options:
- Argemone - Incorrect
- China Rose - Incorrect
- Lemon - Incorrect
- Mustard - Correct

Thus, the only correct match is **Mustard - Parietal**. Therefore, the answer is **option D (only the fourth match is correct)**.