Step 1: Understanding the distribution coefficient.
The distribution coefficient (or partition coefficient) of a solvent is a measure of its relative ability to extract a solute from one phase (usually water) into another phase (such as an organic solvent). The higher the distribution coefficient, the more effective the solvent is for extraction. For acetic acid extraction, the distribution coefficient is typically higher for solvents like ethyl acetate compared to others.
Step 2: Conclusion.
Ethyl acetate is known to have the maximum distribution coefficient at 200°C for the extraction of acetic acid from an acetic acid-water system. Therefore, the correct answer is (2).