Regarding normal oral temperature, which statement is correct?

• A. 35.8-37.5 C
• B. 96.4-99.5 F
• C. Both 35.8-37.5 C and 96.4-99.5 F
• D. None of the above

Answer: (C)

Normal oral temperature is a range, not a single value, and temperature scales are interchangeable. A commonly cited range is about 35.8°C to 37.5°C. When you convert those numbers to Fahrenheit, using F = (9/5) × C + 32, that range becomes roughly 96.4°F to 99.5°F. Because these two ranges describe the same span on different scales, they are both correct representations of normal oral temperature. In practice, small variations occur due to time of day, individual differences, and how the measurement is taken, so proper technique—placing the thermometer under the tongue and keeping lips closed, while avoiding recent eating or drinking—helps ensure an accurate reading.