I think it is wrong __ our advice.A for him not to take B of him not to take C of him not taking

B,首先,it is adj.for sb.to do sth 对于某人来说,做某事是...
it is adj.of sb.to do sth.指某人的品质,可理解为:sb.is adj.
这句是说他做错的,形容人,不是指事.
祝你更上一层楼,有不懂的可以再问哦