Concept:
Different dairy products are processed using distinct thermal and biochemical methods.
Step 1: UHT Milk (A).
• Processed at ultra-high temperature for a very short time
So, A $\rightarrow$ II.
Step 2: Yogurt (B).
• Produced by fermentation using lactic acid bacteria
So, B $\rightarrow$ IV.
Step 3: Paneer (C).
• Formed by coagulation of casein using acid
So, C $\rightarrow$ I.
Step 4: Cheese (D).
• Requires controlled heating over longer duration
So, D $\rightarrow$ III.
Step 5: Final matching.
\[
A-II,\; B-IV,\; C-I,\; D-III
\]
Final Conclusion:
Option (2) is correct.