Step 1: Understanding the Concept:
Different dairy products have different yields.
The yield depends on the product and milk type.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the yields of dairy products.
Step 3: Detailed Explanation:
A. 21-23% yield - Buffalo milk khoa (III).
B. 16-18% yield - Cow milk chhana (I).
C. 50% yield - Kheer (II).
D. 42-44% yield - Rasogolla from cow milk (IV).
Thus, A-III, B-I, C-II, D-IV is the correct matching.
Step 4: Final Answer:
The correct matching is A-III, B-I, C-II, D-IV.
Hence, the correct option is (C).