There are $$30$$ students in your class. The ratio of boys to girls is $$3:2$$. How many boys and girls are there?. 
选项为:A:$$30$$ and $$20$$  B:$$20$$ and $$30$$  C:$$18$$ and $$12$$  D:$$12$$ and $$18$$  请回答其中一个选项.