What will be the work done in blowing a soap bubble of radius 1 cm to 2 cm ? (If surface tension of soap solution is 25 x 10⁻³ N/m)

a. 6π x 10⁵ J
b. 6π x 10⁻⁶ J
c. 24π x 10⁻⁵ J
d. 20π x 10⁶ J