Which type of deed transfers without warranty whatever interest or title a grantor may have?

A quitclaim deed is the correct choice because it is specifically designed to transfer whatever interest or title the grantor possesses in the property without any warranties. This means the grantor does not guarantee that they have a valid title or interest in the property, nor do they assure that the property is free from any encumbrances. The grantor essentially "quits" any claim to the property, which might be complete or partial, hence the name. This type of deed is commonly used in situations such as transferring property between family members or clearing up title issues, especially when the parties are familiar with one another.

In contrast, a warranty deed provides assurances from the grantor regarding the title's validity and the absence of encumbrances. A grant deed generally includes some implied warranties, typically that the grantor has not conveyed the title to someone else during the grantor's ownership. A trust deed is a different instrument used in financing, where the property is transferred to a trustee for the benefit of a lender, rather than transferring ownership rights like the other deeds mentioned.