Choose the sentence (s) which is/ are punctuated correctly.
- It may not be the correct part, but I bet that it works.
- It may not be the correct part but: I bet that it works.
- O father! I hear the sound of guns.
- O Hamlet, speak no more!
I, III, IV
I, III, IV are the correct options.
'but' is a conjunction of contrast that connects two contrasting coordinate clauses ['It may….part' and 'I bet… works'] and is preceded by a comma.