# The first step in photosynthesis is the

$\begin{array}{1 1}(A)\;\text{Joining of 3-carbon atom to form glucose}\\(B)\;\text{Formation of ATP}\\(C)\;\text{Ionization of water}\\(D)\;\text{Excitement of an electron of chlorophyll photon of light}\end{array}$

The first step in photosynthesis is the excitement of an electron of chlorophyll photon of light
Hence (D) is the correct answer.