Correct Answer - AC
When rays are moving from air to glass,
`(1.5)/(f_(1)) = ((1.4 -1))/(+R) + ((1.5 - 1.4))/(+R)`
`(1.5)/(f_(1)) = (0.4)/(R) + (0.1)/(R) = (0.5)/(R)`
`|f_(1)| = 3R`
When rays are moving from glass to air ,
`(1)/(F_(2)) = ((1 - 1.4))/(-R) + ((1.4 - 1.5))/(-R) = (0.5)/(R)`
`|f_(2)| = 2R`