This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
What is true about chorda tympani? 
Select and explain. 
A. Postganglionic sympathetic, B. Postganglionic parasympathetic, C. Preganglionic parasympathetic, D. Postganglionic parasympathetic
C: Preganglionic parasympathetic
Answer: C: Preganglionic parasympathetic 
Explanation: Chorda tympani from facial nerve provides preganglionic secretomotor fibres ( parasympathetic fibres ) to the glands. Ref : B D Chaurasia's Human Anatomy, seventh edition , volume 3 , pg. no., 136.