What if the following methods is least effective for measuring body fat?

AThe bod pod
BUnderwater weighing
CBMI index
DBioelectrical impedance

Verified Answer :

The answer is C. BMI Index

BMI index only compare your body mass with your height. It doesn't tell you how much body fat you got.

It
only used to determined whether you are under weight, normal weight, or
overweight, regardless or the amount of body fat you have