Variability of rainfall is i) largest in regions of high rainfall ii) largest in coastal areas iii) largest in regions of scanty rainfall The correct answer is A. only (i) B. (i) and (ii) C. only (iii) D. (ii) and (iii)

The correct answer is C. only (iii).

Variability of rainfall is the difference between the average and the actual amount of rainfall. It is largest in regions of scanty rainfall because there is a greater chance of a dry year or a wet year. In regions of high rainfall, the average rainfall is already high, so there is less variation from year to year. In coastal areas, the variability of rainfall is intermediate between that of regions of high rainfall and regions of scanty rainfall. This is because coastal areas are affected by both the land and the ocean, which can have different effects on rainfall.

Here is a more detailed explanation of each option:

• Option (i): Variability of rainfall is largest in regions of high rainfall. This is not true. As explained above, variability of rainfall is largest in regions of scanty rainfall.
• Option (ii): Variability of rainfall is largest in coastal areas. This is not entirely true. Variability of rainfall is intermediate in coastal areas, between that of regions of high rainfall and regions of scanty rainfall.
• Option (iii): Variability of rainfall is largest in regions of scanty rainfall. This is true. As explained above, variability of rainfall is largest in regions of scanty rainfall.