Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) :
Assertion (A) : Each photosystem has reaction centre and light harvesting complex.
Reason (R) : The single chlorophyll a molecule forms the reaction centre. 
In the light of the above statements, choose the most appropriate answer from the options given below :

Assertion (A) is true. Each photosystem indeed consists of a reaction center and a light-harvesting complex. The reaction center is where the primary photochemical reaction occurs, involving the excitation and transfer of electrons. The light-harvesting complex surrounds the reaction center and consists of antenna pigments (such as chlorophylls and carotenoids) that capture light energy and transfer it to the reaction center.

Reason (R) is true.The reaction center of each photosystem typically contains a chlorophyll a molecules. This chlorophyll molecule is specifically organized and positioned within the reaction center to facilitate the capture and transfer of excitation energy during photosynthesis.

Both A and R are correct but R is not the correct explanation of A