Read the following text and answer the following questions on the basis of the same:
Gynoecium, is the female reproductive part of the flower. It may consist of a single or more than one pistil. These pistil may be free or fuse. Each pistils has three parts, stigma, style and ovary. Ovary has an ovarian cavity, which has one or many chambers or locules. The placenta is located inside the ovarian cavity. Megasporangia or ovules arise from the placenta.
In which of the following plants the number of ovules in an ovary is one ?

Options

A. Mango
B. Orchids
C. Water melon
D. Papaya

Explanation

To answer the question regarding which plant has only one ovule in its ovary, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Gynoecium**:
- The gynoecium is the female reproductive part of the flower, consisting of one or more pistils. Each pistil has three parts: stigma, style, and ovary.

2. **Identify the Role of the Ovary**:
- The ovary contains the ovarian cavity, which may have one or multiple chambers (locules). Inside the ovarian cavity, the placenta is located, from which the megasporangia or ovules arise.

3. **Determine the Number of Ovules in Different Plants**:
- The question asks for plants where the number of ovules in the ovary is one.

4. **Evaluate Each Option**:
- **Option A: Mango** - The ovary of mango has only one ovule. This is the correct answer.
- **Option B: Orchids** - Orchids typically have multiple ovules. Therefore, this option is incorrect.
- **Option C: Watermelon** - Watermelon also has more than one ovule. This option is incorrect.
- **Option D: Papaya** - Papaya has multiple ovules as well. This option is incorrect.

5. **Conclude the Correct Answer**:
- Based on the evaluation, the correct answer is **Option A: Mango**, as it is the only plant listed that has one ovule in its ovary.