The correct match between ItemI and ItemII is
`{:("ItemI (drug)","ItemII (test)"),("(1) chloroxylenol","(P) Carbylamine test"),("(2) Norethindrone","(Q) Sodium Hydrogen carbonate test"),("(3) Sulphapyridine","(R) Ferric chloride test"),("(4)Penicillin","(S) Bayer's test"):}`

Options

A. 1 - Q , 2 - P, 3 - S , 4 - R
B. 1 - R , 2 - P, 3 - S , 4 - R
C. 1 - R , 2 - S, 3 - P , 4 - Q
D. 1 - Q , 2 - S, 3 - P, 4 - R

Answer

To solve the problem of matching drugs with their corresponding tests, we will analyze each drug and the test associated with it step by step.

### Step 1: Analyze Chloroxylenol
- **Drug:** Chloroxylenol
- **Test:** Ferric chloride test (R)
- **Reasoning:** Chloroxylenol contains a phenolic group, which can be tested using ferric chloride. The presence of phenol will give a color change (red, blue, green, or purple) when ferric chloride is added.

### Step 2: Analyze Norethindrone
- **Drug:** Norethindrone
- **Test:** Bayer's test (S)
- **Reasoning:** Norethindrone has a carbon-carbon triple bond in its structure. Bayer's test is used to detect alkynes (triple bonds) by adding alkaline potassium permanganate, which will decolorize if an alkyne is present.

### Step 3: Analyze Sulphapyridine
- **Drug:** Sulphapyridine
- **Test:** Carbylamine test (P)
- **Reasoning:** Sulphapyridine contains a primary amine group. The carbylamine test is used to detect primary amines, which will give a distinct odor when reacted with chloroform and potassium hydroxide.

### Step 4: Analyze Penicillin
- **Drug:** Penicillin
- **Test:** Sodium hydrogen carbonate test (Q)
- **Reasoning:** Penicillin contains a carboxylic acid group, which will react with sodium hydrogen carbonate to produce carbon dioxide gas. This test distinguishes between carboxylic acids and phenols.

### Final Matching
- (1) Chloroxylenol → (R) Ferric chloride test
- (2) Norethindrone → (S) Bayer's test
- (3) Sulphapyridine → (P) Carbylamine test
- (4) Penicillin → (Q) Sodium hydrogen carbonate test

### Conclusion
The correct matches are:
1. Chloroxylenol - Ferric chloride test
2. Norethindrone - Bayer's test
3. Sulphapyridine - Carbylamine test
4. Penicillin - Sodium hydrogen carbonate test

### Answer
The correct option is:
- (1) R
- (2) S
- (3) P
- (4) Q