A bag contains green mints and red mints only. If 75\% of the mints are green, what is the ratio of the number of green mints to the number of red mints? (A) 
选项为:A:$$3 : 4$$  B:$$3 : 1$$  C:$$4 : 3$$  D:$$1 : 3$$  E:$$3 : 7$$  请回答其中一个选项.