Pookalam is the flower bed or flower pattern designed during Onam in Keral. It is similar to 'Rangoli' in North India and 'Kolam' in Tamil Nadu. During the festival of Onam , you school is planning to conduct a Pookalam competition. Your friend who is a partner in competition , suggests two design given below :

Design -I : The design is made with a circle of radius 32 cm leaving an equilateral triangle ABC in the middle as shown in the figure .
Design-II : The Pookalam is made with 9 circular designs, each of radius 7 cm , enclosed in a square
Refer to Design -I
The length of the altitude of `DeltaABC` is :

Options

A. 8 cm
B. 12 cm
C. 48 cm
D. 52 cm