Who sells butter, sugar and tea ?

The cow eats grass.The italicized word is a:

Keep silence! What type of sentences is this?

Who mends our boots and shoes?

Please give me some water.This sentence is a:

Rajat is the most brilliant student in our class. What type of sentence is this?

Who brought this cat ? What type of sentence is this?

Who brings our letters to our house?

All the words in this list are nouns, except one. Write the word which is not a noun.

Who sells butter, sugar and tea ?