An operator $$\star$$ acts on two numbers to give the following outcomes:  $$3\star2=51$$  $$5\star3=82$$  $$6\star1=75$$  $$9\star4=135$$  What is $$7\star5$$ equal to? 
选项为:A:$$112$$  B:$$121$$  C:$$122$$  D:$$212$$  E:None of the above  请回答其中一个选项.