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In the circuit shown below, the $\text{op-amp}$ is ideal, the transistor has $V_{B E}=0.6 \mathrm{~V}$ and $\beta=150$. Decide whether the feedback in the circuit is positive or negative and determine the voltage $V$ at the output of the $\text{op-amp.}$

1. Positive feedback, $V=10 \mathrm{~V}$
2. Positive feedback, $V=0 \mathrm{~V}$
3. Negative feedback, $V=5 \mathrm{~V}$
4. Negative feedback, $V=2 \mathrm{~V}$