An insurance contract that pays most of the benefits payable to an insured under the Coordination of Benefits clause is referred to as which of the following?

A "contingent plan" in insurance pertains to a backup or alternative arrangement that comes into effect under specific conditions or circumstances. It is not directly related to the concept of a primary plan that primarily covers benefits under coordination of benefits rules.

A "secondary plan" in insurance refers to a policy that provides coverage after the primary insurance has paid its share according to the Coordination of Benefits provision. It is not the same as a primary plan that predominantly handles benefit payments.

An "excess plan" denotes an insurance policy that only starts covering costs once the primary insurance has reached its benefit limit. This differs from a primary plan, which is responsible for most benefits before other insurance policies are activated.