The correct statement that explains 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.
In a pocket veto, if the president does not sign or reject a bill within 10 days and Congress is not in session, the bill effectively fails to become law.