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if the $\text{op-amp}$ in given figure, has an input offset voltage of $5 \; \mathrm{mV}$ and an open-loop voltage gain of $10,000,$ then $v_{0}$ will be

1. $0 \mathrm{~V}$
2. $5 \; \mathrm{mV}$
3. $+15 \mathrm{~V}$ or $-15 \mathrm{~V}$
4. $+50 \mathrm{~V}$ or $-50 \mathrm{~V}$