This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
Following are second messengers 
Select and explain. 
A. CAMP, B. CGMP, C. Inositol triphosphate, D. Diacylglycerol
A: CAMP
Answer: A: CAMP 
Explanation: Cyclic adenosine monophosphate(cAMP, cyclic AMP, or 3&;,5&;-cyclic adenosine monophosphate) is a second messenger impoant in many biological processes.cAMP is a derivative of adenosine triphosphate(ATP) and used for intracellular signal transduction in many different organisms, conveying the cAMP-dependent pathway.Ref: DM Vasudevan, 7th edition