A ring of radius R having a linear charge density λ moves towards a solid imaginary sphere of rad...

A ring of radius R having a linear charge density λ moves
towards a solid imaginary sphere of radius R/2, so that the centre
of ring passes through the centre of sphere. The axis of the ring
is perpendicular to the line joining the centres of the ring and
the sphere. The maximum flux through the sphere in this process is :
Figure 1.417
(A) λ R/ϵ_0
(B) λ R/2 ϵ_0
(C) λπ R/4 ϵ_0
(D) λπ R/3 ∈_0

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