Question

Two air bubbles in water
a). Attach each other
b). Repel each other
c). Don't exert any force on each other
d). May attract or repel depending upon distance between them.

Answer 1

Let the mass of two air bubbles be m1 and m2and distance between their centre be R
Then
From Newton's law of Gravitation force between them will be always attractive and independent of medium between them and is given by
F=Gm1m2R2where G is universal gravitional constant
So, Answer is (a) attract each other

Answer 2

this is your answer up here