JEE Main 2023 Chemistry question on Atomic Structure

The electric potential at the centre of two concentric half rings of radii R$_1$ and R$_2$, having same linear charge density $\lambda$ is :

1. A.
   $\dfrac{\lambda}{4\epsilon_0}$
2. B.
   $\dfrac{2\lambda}{\epsilon_0}$
3. C.
   $\dfrac{\lambda}{2\epsilon_0}$
4. D.
   $\dfrac{\lambda}{\epsilon_0}$

[JEE Main 2023 · 24 Jan · Shift 1 · Paper-1(B.E./B. Tech.)]