Match the following :

	Column I		Column II
A)	Variegated leaf experiment	I)	Mint plant
B)	Moll’s half leaf experiment	II)	T.W. Engelmann
C)	First action spectrum of photosynthesis	III)	Importance of $C{O}_2$
D)	Experimental plant of Priestley	IV)	Importance of chlorophyll

	(A)	(B)	(C)	(D)
1)	IV	III	I	II
2)	I	II	III	IV
3)	IV	III	II	I
4)	I	III	IV	II