Read the given passage and answer the questions.
P, Q, R are different colourless solids, while S is a colourless solution. They are in random order) Sodium chloride (NaCl), Calcium Carbonate `(CaCO_(3))`, Acetic acid `(CH_(3)COOH)` and Phenolphthalein indicator. Small amount of the above substances were added in pairs (e.g. P with Q, Q with R etc.) to a small amount of water in a test tube. They give the following results as shown in the observation table.
Observation Table:

The chemicals are:

Answer

B

Explanation

The chemical P is Phenophthalein, Q is NaCl, R is `CaCO_(3)`, and S is `CH_(3)COOH`.