The following pairs of words bear a certain common relationship, except one pair. Choose the odd pair of words.

Chemist : Medicine

The correct answer is Option (2) → Chemist : Medicine

Analyzing the Relationship

The pattern in most of these pairs is Professional : Place of Work.

• Beautician : Parlour — A beautician works in a parlour. (Professional : Workplace)
• Lawyer : Court — A lawyer works in a court. (Professional : Workplace)
• Engineer : Site — An engineer works at a site (construction or project site). (Professional : Workplace)
• Chemist : Medicine — A chemist deals with medicine, but "Medicine" is a product/object, not a place of work. A chemist's workplace would be a "Pharmacy" or a "Laboratory."

Conclusion

While three pairs describe where a professional performs their duties, the "Chemist : Medicine" pair describes what the professional handles. Therefore, it is the odd one out.