单选题

现有如下集合，能准确删除&ldquo1&rdquo的代码是：（） NSMutableDict...

Question

现有如下集合，能准确删除“1”的代码是：（）

NSMutableDictionary * peoples=
[NSMutableDictionary dictionaryWithObjectsAndKeys:@"1",@"2",@"3",@"4",@"5",@"6", nil]

A. [peoples removeObjectForKey:@"2"]

B. [peoples removeObject:@"1"]

C. [peoples removeObjectAtIndex:0]

D. [peoples removeAllObjects]