The suffix "-graph" indicates an instrument used to record an image. Which option best represents this meaning?

• A. Instrument used to record an image
• B. Instrument used to observe
• C. Instrument used to measure
• D. A disease

Answer: (A)

The idea being tested is what the suffix -graph means. -Graph denotes an instrument that records or writes something, often an image or tracing. That’s why a device named with -graph captures a recording—an electrocardiograph records heart activity, a radiograph records an X‑ray image, and so on. So the option describing an instrument used to record an image matches this meaning. The other options point to different suffixes: observe is typically -scope, measure is -meter, and a disease would be indicated by a different ending like -itis or -pathy, not -graph.