Which of the following is a kind of grass?

Bamboo

The correct answer is Option (1) - Bamboo

Scientifically bamboo is not a tree, but grass. In spite of an appearance that is very often tree-like, bamboo is officially considered grass. 

Unlike bamboo, banana is not a type of grass. Banana plants belong to the family Musaceae and the genus Musa. They are large herbaceous plants, and their structure and growth habits are different from those of grasses like bamboo.