An adult human being has only _________ incisors in his/her mouth.

Correct option is B

Types of Teeth in Adults:

• Incisors (8 total) → 4 in the upper jaw + 4 in the lower jaw (Used for cutting food)
• Canines (4 total) → 2 in each jaw (Used for tearing food)
• Premolars (8 total) → 4 in each jaw (Used for grinding food)
• Molars (12 total) → 6 in each jaw (Includes wisdom teeth, used for chewing)