The frequency response curve of $R C$ coupled amplifier is shown in figure. The band width of the amplifier will be

Image

  • A(a) $f_3-f_2$
  • B(b) ${ }_3 f_4^4-f_1$
  • C(c) $\frac{f_4-f_2}{2}$
  • D(d) $f_3-f_1$
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