There will be serious errors if power factor of non-sinusoid

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M: +2.00/-0.66

There will be serious errors if power factor of non-sinusoidal waveform is measured by electrodynamometer power factor meter. This is true for

[ESE (IES) EE 2019 Paper 2 (Technical)]

A Single-phase meters alone

B 3-phase meters only

C Both Single-phase meters and 3-phase meters

D 3-phase meters with balanced loads