Why we preferably use 4-20 MA over 0-10V & 0-20 MA as a analog signal?

Purpose of using 4-20 MA as analog signal

4 is our live zero so that we will be able to know whether it is z power or not, or the Instrument is faulty|

To check active zero 4 to 20 ma is preferred and current cannot be dropped

Because if we use 0 to 20 ma and the measured signal is 0 ma, we won’t know that the signal is really 0ma or the wire is broken|