Option 1: slippery -> refers to a surface that's hard to grip, not the physical shape or condition of hands.
Option 2: dormant -> means inactive or sleeping, unrelated to the physical deformity described.
Option 3: twisted -> means bent, distorted, or knotted, which perfectly describes hands deformed by age and arthritis.
Option 4: delirious -> refers to a confused mental state, not a physical condition.
Hence, Option 3: twisted -> "Gnarled" describes something that has become knotty, bent, and twisted in shape, commonly used to describe aged hands affected by conditions like arthritis or tree branches that have grown in a twisted manner -> correct