The image shows hormones binding with receptor proteins which initiates a transduction pathway. Identify the transduction pathway.
A)1
B)2
C)3
D)d

Option B

Explanation:

Binding of hormone ligands to a receptor protein which may be found on the surface of the cell membrane initiates a cascade of intracellular transduction pathway that may include for example stimulation of second messengers eg the cyclic AMP. These intracellular transduction pathway may function to amplify these signals in the cells and then carrying this signals to the appropriate destination where the response is initiated or stimulated which may include for example initiation of cell division, apoptosis, inflammation etc.