JEE Advanced Model Paper 8 with solutions for online practice

Consider three converging lenses L1 , L2 and L3 having identical geometrical construction.The refractive index of L1 and L2 are µ1 and µ2 respectively. The upper half of the lens L3 has a refractive index µ1 and the lower half has µ2 . A point O is imaged at O1 by thelens L1 and at O2 by the lens L2 placed in same position. If L3 is placed at same place,