Glucose structure 

C₁ = -CHO (aldehyde carbon)
C₂-C₅ = -CHOH
C₆ = -CH₂OH

A. Hydroxylamine

Reaction name: Oxime formation (nucleophilic addition to carbonyl)

What reacts:
C₁ (aldehyde carbon)

Change:
-CHO → -CH=NOH

Product: Glucoxime

B. Br₂ / H₂O

Reaction name: Mild oxidation of aldehyde

What reacts:
Only C₁ (aldehyde carbon)

Change:
-CHO → -COOH

Product: Gluconic acid

C. Excess acetic anhydride ((CH₃CO)₂O)

Reaction name: Acetylation (ester formation)

What reacts:
All hydroxyl groups: C₂, C₃, C₄, C₅, C₆

Change:
-OH → -OCOCH₃

Note:
C₁ remains as aldehyde

Product: Glucose pentaacetate

D. Concentrated HNO₃

Reaction name: Strong oxidation

What reacts:
C₁ (-CHO) and C₆ (-CH₂OH)

Change:
-CHO → -COOH
-CH₂OH → -COOH

Product: Saccharic acid

Final Matching

A - IV (Glucoxime)
B - I (Gluconic acid)
C - II (Glucose pentaacetate)
D - III (Saccharic acid)