In the circuit shown in figure when the frequency of oscillator is increased, the reading of ammeter `A_(4)` is same as that of ammeter.

Options

A. `A_(1)`
B. `A_(2)`
C. `A_(3)`
D. `A_(1)` and `A_(2)`

Answer

C

Explanation

At resonant frequency,
`i=sqrt(i_(R)^(2)+(i_(L)-i_(C))^(2))=i_(R) ( :' i_(L)=i_(C))`