Solution:
Given the expression below
[tex]\left(6-4i\right)+(-3+4i)-(2-8i)[/tex]Simplifying the expression gives,
[tex]\begin{gathered} =6-4i-3+4i-2+8i \\ Collect\text{ like terms} \\ =6-3-2-4i+4i+8i \\ =1+8i \end{gathered}[/tex]Hence, the answer is 1 + 8i (option B)