A thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out . The frame is comletely covered with the film. When the portion `A` puntured with a pin The thread.
A. Becomes concave toward A
B. Becomes convex towards A
C. Remains in the initial position
D. Either (a) or (b) depending on the size of A w.r.t. B
