Code numbers given to the religion of persons is an example of data on which of the following scales of measurement?

Assigning code numbers to religions only labels categories without any order or magnitude, which is the nominal scale.

An ordinal scale would imply a meaningful rank order, which religion codes do not carry.

An interval scale needs equal spacing between values with no true zero, which does not apply here.

A ratio scale needs a true zero and meaningful ratios, absent for religion codes.

The numbers here are just identifiers, so arithmetic on them would be meaningless.

Nominal is the most basic level of measurement, used purely for classification.