Explanation:

The question asks what is typically measured in megabytes. A megabyte ($\text{MB}$) is a standard unit of digital information storage. Option (a) 'Intensity of earthquake' is measured using scales like the Richter scale or Mercalli intensity scale, not in megabytes. Option (b) 'Capacity of power' is measured in units such as Watts ($\text{W}$), Joules ($\text{J}$), or Watt-hours ($\text{Wh}$), not megabytes. Option (c) 'Memory capacity of computers' refers to the amount of data a computer's memory (like RAM or hard drive) can store. This capacity is indeed commonly measured in bytes, kilobytes ($\text{KB}$), megabytes ($\text{MB}$), gigabytes ($\text{GB}$), and terabytes ($\text{TB}$). Therefore, 'Memory capacity of computers' is the correct answer. Option (d) 'None of these' is incorrect as option (c) is valid.