If a = 2017, b =2016 and c = 2015, then ...

If `a = 2017, b =2016 and c = 2015,` then what is the value of `a ^(2) + b ^(2) + c ^(2) - ab - bc - ca` ?

A

`-2`

B

0

C

3

D

4

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Verified by Experts

The correct Answer is:

C

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