Column-I (Reaction at given temperature)		Column-II (Reaction involve)
A)	${\mathrm{CaSO}}_4\cdot 2{\mathrm{H}}_2\mathrm{O}\underset{\mathrm{\Delta }}{\overset{200°\mathrm{C}}{\to }}$	P)	Formation of lime
B)	${\mathrm{CaSO}}_4\cdot 2{\mathrm{H}}_2\mathrm{O}\underset{\mathrm{\Delta }}{\overset{1100°\mathrm{C}}{\to }}$	Q)	Setting of plaster of Paris
C)	$2{\mathrm{CaSO}}_4\cdot {\mathrm{H}}_2\mathrm{O}+{\mathrm{H}}_2\mathrm{O}\underset{te\mathrm{mp}}{\overset{\mathrm{Room}}{\to }}$	R)	Formation of burnt plaster
D)	${\mathrm{CaSO}}_4+2{\mathrm{H}}_2\mathrm{O}\underset{120°\mathrm{C}-150°\mathrm{C}}{\overset{∆}{\to }}$	S)	Formation of plaster of Paris

	(A)	(B)	(C)	(D)
1)	P	Q	R	S
2)	S	R	P	Q
3)	R	P	Q	S
4)	Q	S	R	P