he is a good leader who always thinks more of the public than of himself

he is a good leader who always thinks more of the public than of himself
He is a good leader who always thinks more of the public than of himself,＿we should follow the example of.a.which b.one c.the one d.whoever答案是B,
one we should follow the example of.本句中one做了前面a leader的同位语我知道 这句话本身是定语从句我知道 我想知道这句话和前一句是什么关系