Under the grace period, an insured submits a $300 claim for medical expenses.

The correct answer is Unpaid premium . In accident and health insurance, the unpaid premium provision permits the insurer to deduct any premium that is due and unpaid from a claim payment when a loss occurs during the grace period. The grace period allows coverage to remain in force for a limited time after the premium due date, giving the insured an opportunity to make the overdue payment without immediate lapse of coverage. However, if a claim is submitted during that period, the insurer has the right to subtract the outstanding premium from the amount otherwise payable.

In this question, the insured submits a $300 claim , but because $100 in premium is overdue , the insurer pays only $200 . That is exactly how the unpaid premium provision operates.

The other choices do not fit. Payment of claims refers to how and to whom claims are paid, not deduction of overdue premium. Misstatement of age applies when an incorrect age affects premium or benefits. Payment actions is not the standard policy provision being tested here. Therefore, the correct answer is A. Unpaid premium .