This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Parasympathetic nervous system comprises of: 
Select and explain. 
A. Cranial nerves IlI, V Vil, X and sacral nerves Sl, s2, s3. s4, s5, B. Cranial nerves III, VII, IX, X and sacral nerves s2, S3, S4, C. Cranial nerves V, VII, IX, X and sacral nerves S2, S3, S4, D. Cranial nerves III, V VII, X and sacral nerves S2, S3, S4
B: Cranial nerves III, VII, IX, X and sacral nerves s2, S3, S4
Answer: B: Cranial nerves III, VII, IX, X and sacral nerves s2, S3, S4 
Explanation: Ans: B. Cranial nerves III, VII, IX, X and sacral nerves s2, S3, S4(Ref Grayls40/ep235;Ganong25/ep257,24/ep2571Parasympatheticflow is cranio-sacral, carried by cranial nemes III, VII, X, X & sacral nerves S2, S3, S4.