An FM signal with a modulation index mf is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of

An FM signal with a modulation index mf is passed through a frequency

1.	An FM signal with a modulation index mf is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of
A.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>m<sub>f</sub></center></td></tr><tr><td style="text-align: center;">3</td></tr></table>
B.
C.	mf
D.	3mf
E.	9mf
Answer» D. 3mf