Rubber band
A belt
bracelet
balloons
headband
Answer: The shortest possible wavelength of sound the organ can produce is 0.224 m
Explanation:
To calculate the wavelength of light, we use the equation:

where,
= wavelength of the light
c = speed of light = 
As wavelength and frequency follows inverse relation, shortest wavelength is produced by highest frequency.
= highest frequency of light =


Thus the shortest possible wavelength of sound the organ can produce is 0.224 m
You are correct. It is D. Don't make me copy it.