The correct answer is D. Policy document.
A policy document is a legal contract between an insurance company and an insured person. It outlines the terms and conditions of the insurance policy, including the coverage that is provided, the premiums that must be paid, and the procedures that must be followed in the event of a claim.
A policy document is a proof of premium payment because it contains a record of all premiums that have been paid. This record can be used to verify that the insured person has met their obligations under the insurance policy.
A F.P.R. (First Premium Receipt) is a document that is issued by an insurance company to confirm that the first premium payment has been received. A R.P.R. (Regular Premium Receipt) is a document that is issued by an insurance company to confirm that a regular premium payment has been received. A proposal form is a document that is used to apply for an insurance policy. It contains information about the insured person and the coverage that is being requested.
While a F.P.R., R.P.R., or proposal form may be used as evidence of premium payment, a policy document is the most definitive proof. This is because a policy document is a legally binding contract that outlines the terms and conditions of the insurance policy.