Step 1: Understanding the Concept
The National Forest Policy of 1988 sets the target forest cover for the country.
Step 2: Plains
For plains it recommends \(33\%\) forest cover, which is about one-third of the area.
Step 3: Hills
For hilly regions, which are prone to erosion and landslides, it recommends \(67\%\) forest cover.
Final Answer:
The policy recommends 33% for plains and 67% for hills.
\[ \boxed{\text{(A) }33,\ 67} \]