The correct option is D 50 centimeters
Length of ribbon used = 2 meters
We know, 1 meter = 100 centimeters
2 meters = 2 × 100
= 200 centimeters
The length of the ribbon is equal to the perimeter of the square.
And, perimeter of a square = 4 × side
200 = 4 × side
Therefore,
one side =perimeter4 =2004 =50 centimeters