Which of the following statements defines 'chromatography'?
1. It is the process of separation of components of a mixture.
2. It is used to separate colours in a dye.
3. It is used to separate a mixture of oil and water.
Select the correct answer using the codes given below.

A

1 and 2 only

B

2 only

C

3 only

D

2 and 3 only