Lower lip blood supply:

Ans. B Labial nasal arteryRef: Gray's Anatomy 41st ed. P 498* External carotid artery gives rise to facial artery branch, which has several branches over face.* Superior labial-supplies to upper lip and antero-inferior part of nasal septum.* Inferior labial-supplies to lower lip.* Lateral nasal-to the ala and dorsum of nose.* Angular-supplies the lacrimal sac and orbicularis oculi.