This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
Taste sensation from anterior part of tongue is mediated by: 
Select and explain. 
A. 10th CN, B. 7th CN, C. 12th CN, D. 5th CN
B: 7th CN
Answer: B: 7th CN 
Explanation: Ans: b (7th CN) Ref: Ganong, 22nd ed, p. 189Taste sensation from anterior 2/3 is by chorda tympani which is a branch of facial nerve.Taste sensation:Anterior 2/3 -- Chorda tympaniPosterior 1/3 + Circumvallate papillae -- GlossopharyngeaPosterior most part VagusPalate -- FacialGeneral sensation of tongue:Anterior 2/3 -- Lingual (5th CN)Posterior 1/3 -- GlossopharyngealNucleus tractus solitarius:Fibres of 7, 9 & 10 associated with taste sensation ends in this nucleus which is present in medulla.