I am sorry yet I can't talk to you now.
I am sorry yet I can't talk to you now.
I am sorry so I can't talk to you now.
I am sorry so I can't talk to you now.
I am sorry although I can't talk to you now.
I am sorry although I can't talk to you now.
I am sorry but I can't talk to you now.
I am sorry but I can't talk to you now.
Correct Answer:
I am sorry but I can't talk to you now.