Answer: Option B 3-4i is the correct option
Step-by-step explanation:
we have formula for discriminant

after that we find the required variable that is to be find according to the quadratic equation given suppose we have to find x
then we have formula

Here we have
of roots if we have one root 3+41 other would be of opposite sign and hence,definitely be 3-4i.
Therefore Option B 3-4i is the correct option.