Select the option in which numbers are related in the same way as are the numbers of following set. 4  :  48 : :  8  :  ?

432 448 478 488

448

4 : 48    →      43 – 42  =  64 – 16  =  48 Similarly, 8 : 448   →     83 – 82  =  512 – 64  =  448