The same notes being played on the Sitar and Veena differ in :
A. Pitch
B. Quality
C. Both quality and pitch
D. Neither quality nor pitch

Hint: The instruments that have similar components for producing sounds have the same frequencies. A sitar and a veena have strings, which vibrate and produce sound. Quality is the attribute of sounds that distinguishes between the sounds that have the same frequencies but are emitted by different sources.

Complete answer:
Let us first understand some common things about a sitar and veena. A sitar and a veena are based on the principle of production of sound with the help of strings. Hence, the sitars and veenas have strings. On the vibration of the strings of the instruments, the music is produced.
Since the vibrating component in both the instruments is string, they will produce a sound that is of the same pitch and frequency.
Quality is that attribute of sounds that helps us to distinguish between the sounds that have the same frequencies but are emitted by different sources. Quality is the sensation that we get when we hear sounds. That is why we can easily distinguish between the sounds of the same frequency but from different instruments, without seeing the instruments.
Therefore, even if a sitar and a veena produce sounds of the same frequency, the quality of the sounds will differ.
Hence, the correct option is B.

Note: There are mainly two categories of instruments. One category is based on beats such as drums and table, where the vibrating component is a stretched membrane. The other category of instruments is based on the music produced by vibrating strings such as sitar and veena.
The instruments of the same category produce sounds of the same frequency. However, the instruments of different categories produce sounds of different frequencies.