How many integers n greater than and less than 100 are there such that if the digits of n are reversed the resulting integer is n plus 9?

I'm assuming the question should read n greater than 10 and less than 100 and there are 8 numbers that satisfy this,

12

23

34

45

56

67

78

89

So the answer is d

http://www.webanswers.com/share-question.cfm?q=how-many-integers-n-greater-than-and-less-than-100-are-there-such-that-if-the-digits-of-n-are-the-is-1379ff| http://www.webanswers.com/answer/1566078/education/how-many-integers-n-greater-than-and-less-than-100-are-there-such-that-if-the-digits-of-n-are-the-is-1379ff| http://www.webanswers.com/report-abuse.cfm?q=how-many-integers-n-greater-than-and-less-than-100-are-there-such-that-if-the-digits-of-n-are-the-is-1379ff&p=1566078