The sides of a right triangle are in arithmetic progression.Let one of the legs be x, the other leg x+d, and the hypotenuse x+2d.
Then by the Pythagorean theorem we have:
`==>3d=x` or `d=-x`
We want the ratio of the legs or `x/(x+d)`
If `d=-x` this makes no sense in the problem as one of the sides has length 0.
So the ratio of sides is 3:4.
The answer is (c) `3/5,4/5`
**Note that this is a Pythagorean triple: `3/5,4/5,5/5` with common difference `1/5`