The correct option is
A Incisors
A normal adult mouth has 32 teeth.
- Incisors: The middlemost four teeth on the upper and lower jaws.
- Canines: The pointed teeth just outside the incisors.
- Premolars: Teeth between the canines and molars.
- Molars or molar: teeth are large, flat teeth at the back of the mouth. Hence, Teeth marked A represents incisors.
So, the correct answer is 'incisors'.