Notes of the same frequency sounded on a piano and on a flute may differ in
I. pitch
II. quality
III. Loudness
A
I only
B
II only
C
I and III only
D
II and III only
E
I, II and III
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Quality is that characteristic note which distinguishes the two sounds of the same loudness and same pitch but emitted by two different instruments.
Source: Myschool Past Questions Archive (Record #42816)