The transient current in lossless L-C circuit when excited from an AC source is, sine wave

The transient current in lossless L-C circuit when excited from an AC source is, sine wave 

(a) Critically damped (b) Underdamped (c) Overdamped (d) Undamped
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The transient current in lossless L-C circuit when excited from an AC source is, sine wave Undamped

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