## **Core Concept**
Remittent fever is characterized by daily fluctuations in body temperature, with the temperature dropping but not returning to normal. This pattern is typical in certain infections and conditions.

## **Why the Correct Answer is Right**
The correct answer, **B. 1-2°C**, indicates that in remittent fever, the daily temperature variation is typically within a range of 1 to 2 degrees Celsius. This fluctuation is significant enough to indicate a pattern of fever that does not resolve completely but shows daily peaks and troughs.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it suggests a much narrower range than what is typically observed in remittent fever.
- **Option C:** This option suggests a much wider range than what is characteristic for remittent fever, which does not usually exceed 2°C in daily variation.
- **Option D:** This option is too broad and does not accurately reflect the typical daily temperature fluctuation seen in remittent fever.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that remittent fever is often seen in conditions such as typhoid fever (though the classic pattern for typhoid is step-ladder), tuberculosis, and some cases of infective endocarditis. Recognizing the pattern of fever can aid in diagnosis.

## **Correct Answer:** B. 1-2°C.