7,24,25. 7 , 23,24 7, 25,26 which of the following will form a right triangle

We know that
In a right triangle
c²=a²+b²
where
a and b are the legs of triangle 
c is the hypotenuse of the triangle
so

case 1)7,24,25
25²=7²+24²
25²> 625
7²+24²> 625
625 is equal to 625> form a right triangle

case 2) 7,23,24
24²=7²+23²
24²> 576
7²+23²> 578
576 is not 578> not form a right triangle

case 3) 7,25,26
26²=7²+25²
26²> 676
7²+25²> 674
676 is not 674>  not form a right triangle

the answer is
7,24,25 form a right triangle

Ibelieve it would be letter c (:

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