In a long glass tube, mixture of two liquids A and B with refractive indices 1.3 and 1.4 respectively forms a convex refractive meniscus towards A

In a long glass tube, mixture of two liquids A and B with refractive indices 1.3 and 1.4 respectively,  forms a convex refractive meniscus towards A. If an object placed at 13 cm from the vertex of the meniscus in A forms an image with a magnification of ‘–2’ then the radius of curvature of meniscus is :

(1) 1 cm

(2) 1 cm/ 3

(3) 2 cm/ 3
(4) 4 cm/ 3

                                                                    (JEE-2025)