<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A group of scientists is studying the mechanism of action of various pancreatic hormones in rats. The scientists studied hormone A, which is secreted by the β-cells of the pancreas, and found that hormone A binds to a complex dimeric receptor on the cell membrane and exerts its effects via dephosphorylation of different intracellular proteins. Now they are studying hormone B, which is secreted by the α-cells and antagonizes the actions of hormone A. Which 2nd messenger system would hormone B utilize to exert its cellular effects?? A: Direct nuclear receptor binding, B: Adenylyl cyclase-cyclic AMP, C: Direct cytoplasmic receptor binding, D: Phospholipase C, E: Tyrosine kinase,  <response>: This is a question about the mechanisms of action of pancreatic hormones. Hormone A binds to a dimeric receptor and signals via dephosphorylation of proteins. Hormone B antagonizes hormone A and is secreted by a different cell type. The key clues are that hormone B antagonizes hormone A, so it likely uses a different signaling mechanism, and that hormone A signals via dephosphorylation, suggesting it does not utilize cyclic AMP or phospholipase CIP3 pathways. Therefore, hormone B likely signals through a 2nd messenger system different from hormone A, with adenylyl cyclase-cAMP being a likely option.B: Adenylyl cyclase-cyclic AMP 