Correct Answer - b.
Here, three optical phenomena tak place-first refraction, then reflection, and finally refraction.
For `1^(st)` refraction, `(1.5)/(v)-(1)/(-2R)=(1.5-1)/(R)`
`(1.5)/(v)=0rArrvoo0`
i.e., rays after refraction get parallel to the axis and strike the mirror normally, getretraced back, and final image is formed at the same place where the object is and of same size. Image would be real.