The correct statement explaining what happens when the president issues a pocket veto is:
Congress will adjourn within 10 days of the president receiving the bill. If the president does not sign the bill, the bill does not become a law because Congress will not have an opportunity to override the veto.
This accurately describes the process of a pocket veto, where if Congress adjourns during the 10 days the president has to act on the bill and the president does not sign it, the bill does not become law.