In the following questions, the word in capital letters has the emphatic stress. Choose the option to which the given word relates. The doctor examined the ...

Emphatic stress marks the word that carries the corrective or contrasting information. The stressed word answers the part of the preceding question that was wrong.

In the sentence "The doctor examined the patient with a STETHOSCOPE," the stress falls on STETHOSCOPE. This means the speaker is emphasising the instrument used - it was a stethoscope, not some other device.

The question that would prompt this emphasis must be one that names the wrong instrument. The question "Did the doctor examine the patient with a microscope?" suggests a microscope was used, and the speaker's stressed response corrects this to STETHOSCOPE. The other options change different elements of the sentence: the person examined ("matron" instead of "patient"), who did the examining ("nurse" instead of "doctor"), or the action ("cure" instead of "examine"), none of which would require stressing the instrument.

The correct answer is the question that mentions a microscope instead of a stethoscope.