What is the current in wire OP? Is it flowing from O to P or P to O?

Solutions: Option B

Whatever that goes in has to come out. With this basic concept, you will be able to solve this question easily.

Ignoring the unknown branch,

Total current going into O = 8A + 6A = 14A

Total current going out of O = 12A + 4A = 16A

Hence in order to be equal, 2A must be flowing in direction PO.

Hence answer is B.