Question

In which sentence is the word but used as a preposition? A. We would like to visit the Grand Canyon, but our vacation time is up. B. John liked baseball but not football. C. None but the brave shall enter in. D. Children should be seen but not heard.

Answer 1

Im think that the answer is C.

Answer 2

C. None but the brave shall enter in.

Here but is not a conjunction but a preposition itself.

Preposition is a part of speech where the word in a sentence describes the position of the subject or the word being illustrated.