Why the answer is B, and why the others tempt you.
**The reasoning**
This is an **analogy question** — you're looking for the relationship between the first pair, then applying that same relationship to the second pair.
Ask yourself: *Where does a doctor primarily work?* → A hospital.
Now apply the same logic: *Where does a teacher primarily work?* → A school.
The relationship is: **Professional : Primary workplace**
Both doctor and teacher are professions, and we're matching them to where they typically carry out their duties.
**Why the wrong options tempt you**
- **Library** — Teachers use libraries, yes, but it's not their *primary* workplace. Students and librarians work there more.
- **Office** — Too generic. Many professionals work in offices, but teachers' main work happens in classrooms.
- **Lab** — Only science teachers use labs regularly, and even then, it's part of a school, not their main base.
**Quick takeaway**
In analogy questions, identify the *exact relationship* in the first pair (person → their main workplace), then find the option that maintains that **same specific relationship** — not just a loose connection.
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