A dipole is placed at point A at a large distance $r$ from centre O of earthed metal sphere whose radius is R $(R<r)$ . Angle of dipole moment is  ${\theta }_1$ with radius vector $OA$ . Now dipole is rotated from $\theta ={\theta }_1$  to  $\theta ={\theta }_2$.

	Column – I		Column – II
A)	${\theta }_1=0to{\theta }_2={90}^0$	P)	Electrons flow from earth to sphere
B)	${\theta }_1={180}^{0}to{\theta }_2=0^0$	Q)	Electrons flow from sphere to ground
C)	${\theta }_1={60}^{0}to{\theta }_2={120}^0$	R)	There is no flow of net charge from sphere to ground
D)	${\theta }_1={90}^{0}to{\theta }_2=-{90}^0$	S)	Work done in the process is zero
		T)	Work done in the process in non-zero