1. Class 2 in the second year won first place.

Question

2. Class 2 in the second grade won first place.

3. Class 2-2 in the second year won first place.

4. Class 2-2 in the second grade won first place.

(Are they all grammatical and the same in meaning?)

Answer 1

its grammatical

Answer 2

The most common one is number 2.