In unsigned complement arithmetic, if the overflow carry bit is $0$ then $\_\_\_\_\_\_\_\_\_\_$

Question $28$ options:

just discard it and take the remaining bits as the correct result

result is negative and so discard the overflow bit but take $2\text{'}$s complement of the remaining bits

result is negative and so discard the overflow bit while the remaining bits will be the correct result

none of the above