Given below are the steps to test the presence of proteins in a food item. These steps are not in correct sequence.
1. Take a small quantity of food item in a test tube add 10 drops of water to it and shake it.
2. Make the paste or powder of the food to be tested.
3. Add 10 drops of caustic soda solution to the test tube and shake well.
4. Add 2 drops of copper sulphate to it.
The correct sequence of these steps is

Options

A. 1, 2, 4,3
B. 2, 1, 4, 3
C. 2, 1, 3, 4
D. 4, 2, 1, 3

Answer

B

Explanation

The correct sequence of the steps are 2, 1, 4, 3