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 matching question between the drugs (Item I) and their corresponding tests (Item II), we will analyze each drug and identify the appropriate test for each.

### Step-by-Step Solution:

1. **Identify the first drug: Chloroxylenol**
- Chloroxylenol is a phenolic compound. Phenols react with ferric chloride (FeCl3) to form a colored complex.
- **Matching:** Chloroxylenol (1) matches with Ferric chloride test (R).

2. **Identify the second drug: Norethindrone**
- Norethindrone is a synthetic progestin (steroid). It does not have a specific test listed in the options but is known to react with sodium hydrogen carbonate.
- **Matching:** Norethindrone (2) matches with Sodium Hydrogen Carbonate test (Q).

3. **Identify the third drug: Sulphapyridine**
- Sulphapyridine contains a primary amine group which can react with chloroform (CHCl3) in the presence of alcoholic KOH to form isocyanide, which is characterized by its foul smell.
- **Matching:** Sulphapyridine (3) matches with Carbylamine test (P).

4. **Identify the fourth drug: Penicillin**
- Penicillin contains a carboxylic acid group that reacts with sodium hydrogen carbonate to produce carbon dioxide gas, which is observed as effervescence.
- **Matching:** Penicillin (4) matches with Bayer's test (S).

### Final Matches:
- (1) Chloroxylenol → (R) Ferric chloride test
- (2) Norethindrone → (Q) Sodium Hydrogen Carbonate test
- (3) Sulphapyridine → (P) Carbylamine test
- (4) Penicillin → (S) Bayer's test

### Summary of Matches:
- (1) → (R)
- (2) → (Q)
- (3) → (P)
- (4) → (S)