Which triangle’s unknown side length measures 7 units?A: A right triangle with a side length of 5 and hypotenuse with length StartRoot 74 EndRoot.B: A right triangle with a side length of StartRoot 18 EndRoot and hypotenuse with length 5.C: A right triangle with a side length of StartRoot 6 EndRoot and hypotenuse with length StartRoot 43 EndRoot.D: A right triangle with a side length of StartRoot 2 EndRoot and hypotenuse of 4.