Vibrio cholerae is a motile bacteria belonging to the group of

The correct option is Monotrichous.

To understand why this is the correct classification, let us break down the terminology and characteristics of bacterial flagella arrangement:

1. Flagella Definition: Flagella are hair-like, motile structures that protrude from the cell wall of certain bacteria, enabling them to swim through liquid environments.

2. Classification Based on Flagellation: Bacteria are grouped according to the number and position of their flagella:
- Monotrichous: A single flagellum located at one pole (end) of the bacterium.
- Lophotrichous: A cluster (tuft) of flagella at one or both ends.
- Amphitrichous: A single flagellum at both poles of the bacterium.
- Peritrichous: Multiple flagella distributed all over the entire surface of the bacterial cell.

3. Vibrio cholerae characteristics: Vibrio cholerae is a comma-shaped, Gram-negative bacterium responsible for causing cholera. Under a microscope, it is observed to possess a single polar flagellum. This specific arrangement allows it to swim in a rapid, darting motion.

Therefore, because it has only one flagellum located at one of its poles, Vibrio cholerae is classified under the group of Monotrichous bacteria.