A glass tube of uniform internal radius(r) has a valve separating the two identical ends. Intially, the valve is in a tightly closed position. End 1 has a hemispherical soap bubble or radius r. End 2 has sub-hemispherical soap bubble as shown in figure. Just after opening the valve,
A. air from end 1 flows towards end 2. no change in the volume of the soap bubble
B. air from end 1 flows towards end 2. volume of the soap bubble at end 1 decreases
C. no change occurs
D. air from end 2 flows towards end 1. volume of the soap bubble at end 1 increases