The primary acceptor of electrons from PS-II is A located towards the stroma side of the thylakoid and transfer its electrons to the hydrogen acceptor, namely B and it removes protons from C and cause accumulation of protons in D.  What are A, B, C and D ?
 

	A	B	C	D
1	Pheophytin	PQ	Stroma	Lumen
2	Pheophytin	PQ	Lumen	Stroma
3	FRS	Fd	Stroma	Lumen
4	FRS	Fd	Lumen	Stroma

Pheophytin is a chlorophyll-derived molecule found in plants and other photosynthetic organisms. It is the primary acceptor of electrons from PS II. It is located towards the stroma side. It transfers electrons to the hydrogen electron called plastoquinone. It removes protons from stroma and cause accumulation of protons in the lumen of thylakoids.