Assertion: A mixture of plant pigments can be separated by chromatography. Reason: Chromatography is used for the separation of coloured substances into individual components. Read the assertion and reason carefully to mark the correct option out of the options given below:

• A.  If both assertion and reason are true and the reason is the correct explanation of the assertion.
• B.  If both assertion and reason are true but reason is not the correct explanation of the assertion.
• C.  If assertion is true but reason is false.
• D.  If the assertion and reason both are false.
• E.  If assertion is false but reason is true.