ok ive got pretty much my whole test done but am stuck on this one question

Regarding management and leadership, Which statement is most accurate?

A. leaders can be good managers,and good managers can be good leaders.
B. leaders arent managers and managers arent leaders.
C.leadership and management are entirely unrelated
D. Most effective managers arent good leaders

IN my opinion A is the most obvious answer... but you never know with theses test sometimes and i cant find anywhere in the book where it states this

I agree. The best answer is A.