Submental lymph nodes drains from -
Ans. is 'a' i.e., Centre of lower lips Submental lymph nodeso These lymph nodes lie on the mylohyoid in the submental triangle. The receive afferents from superficial tissue below chin, central part of lower lip, adjoining gums, anterior part of the floor of the mouth and tip of the tongue. These nodes, themselves, drain into (efferent) into submandibular nodes.
Centre of lower lips
Posterior 1 /3 of tongue
Anterior 2/3 of tongue
Angle of mouth
Oral Cavity & Tongue