Six point charges, each of the same magnitude $q$, are arranged in different manners as shown in Column-II. In each case, a point $M$ and a line $P Q$ passing through $M$ are shown. Let $E$ be the electric field and $V$ be the electric potential at $M$ (potential at infinity is zero) due to the given charge distribution when it is at rest. Now, the whole system is set into rotation with a constant angular velocity about the line $P Q$. Let $B$ the magnetic field at $M$ and $\mu$ be the magnetic moment of the system in this condition. Assume each rotating charge to be equivalent to a steady current.

• A

  (A) q,t, (B) q,s, (C) p,q,t, (D) r,s,t
• B

  (A) q,r,s, (B) r,s, (C) p,r, (D) r,s,t
• Correct answer
  C

  (A) p,r,s, (B) r,s, (C) p,q,t, (D) r,s
• D

  (A) p,r, (B) q,s, (C) p,r,t, (D) r,s

Hence, the correct answer is option: 'C'.