An ideal coil of $10\,H$ is connected in series with a resistance of $5\,\Omega$ and a battery of $5\,V$. After $2\,s$ the connection is made,the current flowing in ampere in the circuit is
- A$(1 - e^{-1})$
- B$(1 - e)$
- C$e$
- D$e^{-1}$
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