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Consider the following statements:

1. A small bubble of one fluid immersed in another fluid has a spherical shape.

2. The droplets of a fluid move upward or downward in another fluid due to unbalance between gravitational and buoyant forces.

3. Droplets of bubbles attached to a solid surface can remain stationary in a gravitational fluid if the surface tension exceeds buoyant forces.

4. Surface tension of a bubble is proportional to its radius while buoyant force is proportional to the cube of its radius.                                

Which of the above statements are correct?

(A) 1, 2, 3 and 4          (B) 1, 2and 4 only

(C) 1 and 3                  D) 2, 3 and 4 only

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