Why is the sound produced by an organ pipe open at both ends is better than that of an organ pipe closed at one end ?

Options

A. In a closed pipe, the sound can not come out of the closed end while in the open pipe, sound can come out of both the ends.
B. A closed pipe produces only odd harmonics, while an open pipe produces all harmonics
C. A closed pipe produces only the fundamental frequency , while the open pipe produces the fundamental as well as the harmonics
D. an open pipe produces only the fundamental frequency but the closed pipe produces all harmonics

Answer

B