Draw the right triangle and labeling one acute angle A,

and .

So opposite leg 3 and adjacent leg 1.

The simplest triangle for which .

Apply Pythagorean identity:

                    (Substitute )

                              (Take square root of each side)

Hypotenuse =

Now we can find .

                            (Substitute )

                  (Divide denominator and numerator by )

The option B is right choice.