Given below are the steps to test the presence of protein in a food item:
A) take a small quantity of the food item in a test tube add 10 drops of water to it and shake it.
B) make a paste or powder of food to be tested.
C) add 10 drops of caustic soda solution to the test tube and shake well.
D) add 2 drops of copper sulphate solution to it.
which of the following is the correct sequence of the steps?
1) A,B,D,C
2) B,A,D,C
3) B,A,C,D
4) D,B,A,C​