Two tones of frequencies \[{{n}_{1}}\]and \[{{n}_{2}}\]are sounded tog – McqOptions

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1.	Two tones of frequencies \[{{n}_{1}}\]and \[{{n}_{2}}\]are sounded together. The beats can be heard distinctly when
A.	\[10<({{n}_{1}}-{{n}_{2}})<20\]
B.	\[5<({{n}_{1}}-{{n}_{2}})>20\]
C.	\[5<({{n}_{1}}-{{n}_{2}})<20\]
D.	\[0<({{n}_{1}}-{{n}_{2}})<10\]
Answer» E.

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