From the sentences given below as options, choose the one in which the conjunction is used correctly.
1
The Tamil Nadu state's coast guard said 113 fishermen went missing on Thursday because 71 of them have been rescued
2
The Tamil Nadu state's coast guard said 113 fishermen went missing on Thursday so 71 of them have been rescued.
3
The Tamil Nadu state's coast guard said 113 fishermen went missing on Thursday since 71 of them have been rescued.
4
The Tamil Nadu state's coast guard said 113 fishermen went missing on Thursday but 71 of them have been rescued.