Testing Quizzes Quantitative Testing

Question:
I bought 2 varieties of pens, the first variety was for Rs 12 each and the second variety costing variety costing Rs 17 each, spending Rs 157 in total. In how many different combinations I could have purchased the pen?

Option A):
3
Option B):
5
Option C):
1
Option D):
2

Correct Answer is Option C):
1