The correct answer is option 4, which states that all of the above plants (Jasmine, Sugarcane, and Turmeric) are propagated by vegetative methods.

Propagation refers to the process of reproducing new plants from existing plant parts, such as stems, roots, or leaves, instead of using seeds. Vegetative propagation is a common method used for a variety of plants, particularly those that are difficult to grow from seeds or that have desirable traits that need to be preserved.

Jasmine can be propagated through cuttings, where a portion of the stem is rooted to establish a new plant. Sugarcane is propagated by planting stem cuttings, called setts, which can develop into new sugarcane plants. Turmeric, on the other hand, is usually propagated through rhizome division, where the underground swollen rhizomes are split into smaller sections and planted to produce new turmeric plants.

Therefore, all of the plants mentioned in the question (Jasmine, Sugarcane, and Turmeric) can be propagated by vegetative methods.