When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is

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[A].	a series combination of R and C
[B].	a parallel combination of R and C
[C].	a series combination of R and parallel combination of R and C
[D].	a pure capacitor

Answer: Option C

Explanation:

Initially capacitor behaves as short-circuit and finally as open circuit.