Correct Answer:
Option C - Instrument for measuring rainfall is called Hyetometer (A rain gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over a set period of time).
C. Instrument for measuring rainfall is called Hyetometer (A rain gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over a set period of time).