A thin Plano-convex glass lens $(\mathrm{\mu }=\mathrm{ }1.5)$ has its plane surface silvered and $\mathrm{R}$ is the radius of curvature of curved part, then which of the following ray diagram is true for an object placed at $\mathrm{O}$?
($\mathrm{O}$ is at a distance of $2\mathrm{R}$ from the lens)