Answer: A. Buccal
Explanation:
The buccal side of the teeth is the surface of the tooth which faces towards the cheek. This surface is also called as the facial surface as in the reference to the front side of the teeth. The tooth surface which faces the tongue is known as the lingual surface. Occlusal surface is the chewing surface of the tooth. The proximal surface is the surface which is in reference to the tooth in close proximity of the other tooth.
