The answer is: B. Bagpipe
A shehnai is a wind instrument from the oboe family, played in Indian classical music. It is made of wood and has a double reed. The bagpipe is a wind instrument that is played by blowing air into a bag, which then causes reeds to vibrate. The flute is a woodwind instrument that is played by blowing air across a hole in the instrument. The sitar is a stringed instrument that is played by plucking the strings with the fingers. The harmonica is a wind instrument that is played by blowing air into the instrument and then pressing down on the holes to change the pitch of the sound.
The bagpipe is different from the other instruments because it is the only one that is played by blowing air into a bag. The other instruments are all played by blowing air into the instrument itself.