This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Biochemistry
Which of the following is the most impoant effector pathway for action of Nitric Oxide: 
Select and explain. 
A. Adenylate cyclase pathway, B. Phosphatidylinositol pathway, C. Guanylate cyclase pathway, D. MAP Kinase pathway
C: Guanylate cyclase pathway
Answer: C: Guanylate cyclase pathway 
Explanation: The most impoant effector pathway for NO is activation of the soluble form of guanylyl cyclase. Soluble guanylate cyclase (sGC) catalyses the conversion of guanosine 5&;-triphosphate (GTP) to cyclic guanosine 3&;5&;-monophosphate (cGMP) Ref: Harper