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The current $I$ in the circuit shown is ______________.

1. $1.25 \times 10^{-3} \; \text{A}$
2. $0.75 \times 10^{-3} \; \text{A}$
3. $– 0.5 \times 10^{-3} \; \text{A}$
4. $1.16 \times 10^{-3} \; \text{A}$