Which of the following is NOT a storage root?

Breathing root

The correct answer is Option (3) - Breathing root

The correct answer is Breathing root.

Breathing roots are not a type of storage root; they are specialized structures found in certain plants, particularly those growing in marshy or waterlogged habitats. These roots, also known as pneumatophores or respiratory roots, grow vertically above the water level and contain pores (lenticels) that facilitate gas exchange between the submerged roots and the atmosphere. They help plants obtain oxygen for respiration in environments where the soil is waterlogged and lacks sufficient oxygen.

On the other hand, Fusiform root, Napiform root, and Conical root are all examples of storage roots. They are modified roots that store reserve food materials such as starch, sugars, and other nutrients to support the plant during periods of dormancy or when external conditions are unfavorable for growth. These types of roots typically have a swollen appearance and serve as a reservoir of nutrients for the plant's growth and development.