AIIMS 2019 Physics Work Done in Expanding Bubbles MCQ Question

The work done to expand a soap bubble can be calculated using the formula $W = 4\pi R^2 \gamma$, where $\gamma$ is the surface tension and $R$ is the radius of the bubble. For a radius $R = 5 \, \text{cm} = 0.05 \, \text{m}$ and surface tension $\gamma = 0.1 \, \text{N/m}$, the work done is $W = 4\pi (0.05)^2 (0.1) = 6.28 \times 10^{-3} \, \text{J}$, which corresponds to option B. Other options are incorrect as they do not match this calculated value, indicating either miscalculations or incorrect assumptions about the parameters involved.