Which of the following commands will copy one disk partition /dev/sda3 to /dev/sdb3?

Which of the following commands will copy one disk partition /dev/sda3 to /dev/sdb3?

A.
dd if=/dev/sdb3 of =/dev/sda3 bs=4096 conv=notrunc

B.
dd if=/dev/sda3 of=/dev/sdb3 bs=4096 conv=notrunc

C.
dd –input /dev/sda3 –output /dev/sdb3 bs=4096 conv=notrunc

D.
dd –input /dev/sdb3 –output /dev/sda3 bs=4096 conv=notrunc