A note is the octave of another note if it has
A
a frequency twice that of the first note
B
frequency half that of the first note
C
the same fundamental frequency as the first one
D
a frequency frequency eight times that of the first note
Verified Correct Answer: A.
Physical Principles & Numerical Solution
When the frequency of a note is doubled, it is perceived as being one octave higher. For example, if a note has a frequency of fff, the note one octave higher will have a frequency of 2f. Conversely, a note that is one octave lower has a frequency half that of the original note, but the question specifically asks for the octave above
Source: Myschool Past Questions Archive (Record #28075)