Which of the following is NOT a coverage form under the HO series?

The HO-9 form is not a recognized coverage form in the Homeowners (HO) series. The standard homeowners' policy forms include the HO-1, HO-2, HO-3, HO-4, HO-5, and HO-6, each designed to provide specific types of coverage for residential properties.

The HO-3 is a widely used form that provides special coverage for the dwelling and broad coverage for personal property, making it a popular choice for homeowners. The HO-5 extends even further, offering open peril coverage for both the dwelling and personal property, which provides comprehensive protection.

The HO-2 form offers a named perils coverage for both dwelling and personal property, making it a more limited option compared to the HO-3 and HO-5.

In contrast, the HO-9 coverage form does not exist within the standard classification of homeowners policies, hence making it the correct answer as the option that does not belong to the HO series.