Convert the following simple sentence into a compound sentence.
Tina called me yesterday. I was not able to attend her call.
1
I was not able to attend her call because Tina called me yesterday.
2
Since, I was not able to attend her call Tina did not call me.
3
I called Tina as she did not take my call.
4
Tina called me yesterday, but I was not able to attend her call.