When a vessel with a single right-hand propeller backs to port the __________.

Correct Answer: Option C — bow falls off to starboard

When a right-handed propeller backs, the upper blades move toward the starboard side, creating a transverse thrust that pushes the stern to starboard. Consequently, the bow pivots and falls off to the opposite side, which is to port. This is a fundamental principle of single-screw ship handling.