Botulinum affects all except:: (A) Neuromuscular junction, (B) Preganglionic junction, (C) Post ganglionic nerves, (D) CNS
Answer is D. Ans. is 'd' i.e., CNS(Ref: Harrison, 18th/e, p. 1200 and 17th/e, p. 901)* The central nervous system is not involved because the toxin does not cross the blood brain barrier.