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In which of the following ways, absorption is related to transmittance?

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In which of the following ways, absorption is related to transmittance?

(a) Absorption is the logarithm of transmittance

(b) Absorption is the reciprocal of transmittance

(c) Absorption is the negative logarithm of transmittance

(d) Absorption is a multiple of transmittance

I got this question in a job interview.

The origin of the question is Introduction to UV Visible Spectrometers in chapter Colorimetry and Spectrometry of Analytical Instrumentation

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Correct option is (c) Absorption is the negative logarithm of transmittance

To explain I would say: Transmittance is the ratio of the radiant power transmitted by a sample to the radiant power incident on the sample. Absorption is the negative logarithm of transmittance.

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