Which of the following statements are correct?

1. From the region of elongation, some of the epidermal cells form root hairs.
2. Pneumatophores are seen in Rhizophora.
3. Adventitious roots are seen in the banyan tree.
4. Maize and sugarcane have prop roots.

The zone of elongation region of a root increases length of the root. The external cells possess the power of absorption of water and minerals salts from the soil. The root hair zone represents the zone of differentiation or maturation because different types of primary tissues differentiate or mature in this region. Maize and sugarcane have stilt roots.