Given below are two statements:
Statement I: Pure Aniline and other arylamines are usually colourless.
Statement II: Arylamines get coloured on storage due to atmospheric reduction.
In the light of the above statements, choose the most appropriate answer from the options given below:

Statement I: Pure aniline and other arylamines are usually colourless.

Pure aniline and other aromatic amines are colourless in their pure state. Therefore, Statement I is correct.

Statement II: Arylamines get coloured on storage due to atmospheric reduction.

Arylamines become coloured on prolonged storage because they undergo slow oxidation in the presence of atmospheric oxygen and light. The colour formation is due to atmospheric oxidation, not reduction.

Hence, Statement II is incorrect.

Therefore:

• Statement I is correct.

• Statement II is incorrect.

Hence, the correct answer is

$$\boxed{\text{Option C: Statement I is correct but Statement II is incorrect.}}$$