The largest flower in the world is that of

Options

A. Lotus
B. Rafflesia
C. Giant cactus
D. Parasite

Explanation

To solve the question "The largest flower in the world is that of," we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Lotus
- B) Rafflesia
- C) Giant Cactus
- D) Parasite

2. **Evaluate Each Option**:
- **A) Lotus**: The lotus is a well-known aquatic flower, but it is not the largest flower in the world.
- **B) Rafflesia**: This flower is known for being the largest flower in the world. It can grow up to 3 feet in diameter and is famous for its unpleasant odor, which resembles rotting meat.
- **C) Giant Cactus**: While cacti can have large flowers, the giant cactus itself is not known for having the largest flower.
- **D) Parasite**: This term refers to organisms that depend on a host for survival. It does not specifically refer to a flower.

3. **Conclusion**: Based on the evaluations, the only option that correctly identifies the largest flower in the world is **B) Rafflesia**.

### Final Answer:
The largest flower in the world is that of **Rafflesia**.

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