...see this...how second one is optically active as there are line of symmetries in it..so how it can be optically active????

...see this...how second one is optically active as there are line of symmetries in it..so how it can be optically active???? Stereochemistry: Facial isomer Meriodional dotn isomers are optically active. Theretore, a total ot 4 isomers exist