Arrange the Events of a Second Messenger System in the Correct

Arrange the events of a second messenger system in the correct order. 1)
Protein kinase is activated
2)
G protein is activated
3)
Neurotransmitter binds to its receptor
4)
Protein closes potassium channel
5)
Cyclic AMP is produced
6)
Phosphorylation takes place

A) 1 $\rightarrow$ 2 $\rightarrow$ 5 $\rightarrow$ 6 $\rightarrow$ 4 $\rightarrow$ 3
B) 3 $\rightarrow$ 5 $\rightarrow$ 6 $\rightarrow$ 1 $\rightarrow$ 2 $\rightarrow$ 4
C) 5 $\rightarrow$ 2 $\rightarrow$ 6 $\rightarrow$ 1 $\rightarrow$ 3 $\rightarrow$ 4
D) 3 $\rightarrow$ 2 $\rightarrow$ 5 $\rightarrow$ 1 $\rightarrow$ 6 $\rightarrow$ 4
E) 5 $\rightarrow$ 2 $\rightarrow$ 6 $\rightarrow$ 1 $\rightarrow$ 4 $\rightarrow$ 3