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Two identical thin ring, each of radius R meters, are coaxially placed a distance R metres apart. If `Q_1` coulomb, and `Q_2` coulomb, are repectively the charges uniformly spread on the two rings, the work done in moving a charge q from the centre of one ring to that of the other is

A

zero

B

`(q(Q_(1) - Q_(2)) (sqrt(2) - 1))/(4 sqrt(2) pi epsilon_(0) R)`

C

`(q(Q_(1) -Q_(2)) (sqrt(2) -1))/(4sqrt(2) pi epsilon_(0) R)`

D

`(qsqrt(2)(Q_(1) + Q_(2)))/(4 pi epsilon_(0) R)`

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