Final answer:
The combining form tele/o-, as found in the medical word telemetry, means distant. The correct option is 1.
Step-by-step explanation:
The combining form 'tele/o-' means 'distant', a term often used in medical contexts such as in 'telemetry', which refers to remote monitoring.
This prefix is derived from the Greek word tele, meaning 'far off' or 'at a distance'. Telemetry is the process of recording and transmitting the readings of an instrument from a distance or remote location to a receiving station for monitoring or analysis. A common example in medicine is the use of telemetry to monitor a patient's heart rate and rhythm remotely. Therefore, the correct answer to the question is option 1) distant.