If the speed in the upstream is 9 km/h and upstream the speed is 3 km/h. is the speed of the boat and the speed of the stream.

• A. 3 किमी0/घंटा, 6 किमी0/ घंटा
• B. 2 किमी0/घंटा, 5 किमी0/ घंटा
• C. 4किमी0/घंटा, 8 किमी0/ घंटा
• D. 10 किमी0/घंटा,12 किमी0/ घंटा