Baywoo14
Answered

In which sentence is the word but used as a preposition?

AChildren should be seen but not heard.
BWe would like to visit the Grand Canyon, but our vacation time is up.
CNone but the brave shall enter in.
DJohn liked baseball but not football.

Verified Answer :

hanima

for me B is the most appropriate answer

The sentence in which the word but is used as a preposition is C) None but the brave shall enter in. 
This is true because the word but can be replaced with the preposition except, which means it is also a preposition. 
In the rest of the sentences, but is used as a conjunction.