Question: What happens to the CURRENT_IRV variable when a new transmission opportunity occurs in the Sidelink process?
Option 1: It is incremented by 1.
Option 2: It is set to the last value of the sequence of redundancy versions (i.e., 1).
Option 3: It is set to 0.
Option 4: It remains unchanged.
Explanation: According to the Sidelink process, when a new transmission opportunity occurs, the CURRENT_IRV variable is reset to 0. This ensures that the sequence of redundancy versions starts from the beginning for each new transmission.