If a-b:b-c:c-d=1:2:3, then what is the v...

If `a-b:b-c:c-d=1:2:3`, then what is the value of `(a + d): c`?

A

`1: 2`

B

`2 : 1`

C

`4 : 1`

D

`3 : 1`

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The correct Answer is:

B

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