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 convex toward `A`
B. become concave towards `A`
C. ramains in the in the initial position
D. either `(A)` or `(B)` depending on size of `A w.r.t. B`