In each of the ing question select the one which is different from other alternatives.

Options

A. `5-15-20 `
B. `10-30-40`
C. `4-12-15 `
D. `25-50-75 `

Answer

C

Explanation

Except in option (3) In all other options the second and the third numbers are multiple of the first number.
`5 xx 3 = 15 and `
`5 xx 4 = 20`
`10 xx 3 = 30 and `
`10 xx 4 = 40`
`25 xx 2 = 50 and `
`25 xx 3 = 75`