Is this an imperative, declaritive, interrogative or exclamatory

Question

1.God exist
answer: exclamatory
2.What are you up to?
answer: interrogative
3. Some dentist have clean teeth
answer: imperative

Answer 1

1. Could be either exclamatory or declarative.

2. is interrogative.

3. is not imperative.

https://i.pinimg.com/736x/63/bc/af/63bcaff6fd4edb51a56ddf1ec5fdeaf7--kinds-of-sentences-sentence-types.jpg

Answer 2

Some dentist have clean teeth
answer: declarative

Answer 3

Yes, 3 is declarative.