Mean annual range of temperature is
A. Difference between maximum and minimum daily temperature.
B. Difference between maximum and minimum average daily temperature
C. Difference between maximum and minimum mean monthly temperatures recorded in a year
D. Difference between maximum and minimum temperatures in a month

Hint: The annual range is defined as the difference between the hottest and coldest months, in each case taking the mean monthly temperatures. The difference between the average maximum temperature in January and the minimum temperature, and the corresponding average temperature in July, is approximately given.

Complete answer:
Mean annual range of temperature: In simple words, temperature refers to the hotness or coldness of a body. It is defined as a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases. Solid, liquids and gases all have a temperature and it increases when molecules vibrate faster.

The range is the difference between the lowest and highest values. So, to find the annual range of temperature we will subtract the maximum and minimum values in a month and to find the mean temperature, it is calculated by dividing the sum observations by the total number of observations. Therefore, the mean annual range of temperature is calculated by the difference between maximum and minimum mean monthly temperatures recorded in a year.

Therefore, the correct answer is C

Note: An increase or decrease in temperature causes various changes in the physical and chemical processes of life such as it affects the solubility, density of various metals. Temperature also affects the rate of chemical reaction and the thermal radiations from the surface of objects. Kelvin is the most commonly used scale by scientists.