Directions:
AB and CD  bisect each other at O. If AD = 6 cm.

Question:
Then BC is:

Option A):
5.9 cm
Option B):
6 cm
Option C):
4.8 cm
Option D):
7 cm

Correct Answer is Option B):
6 cm

Explanation:
Since, AB and CD bisects each other at O,
Hence, BC = AD = 6 cm.