Oscillator __________ an AC input for giving an AC output

1.	Oscillator __________ an AC input for giving an AC output
A.	Doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t need
B.	Need
C.	Doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t need at lower frequencies
D.	Doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t need at higher frequencies
Answer» B. Need

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