The chart shows the number of pregnancies in a year among 100 typical users of four options: no method, the male condom, the combined pill and vasectomy. The letters P, Q, R and S hide the options. Which letter is vasectomy?

Fig. 1: A horizontal bar chart of pregnancies in the first year among 100 typical users of four options hidden behind the letters P, Q, R and S. The bars are P 13, Q 85, R 7 and S 0.15, with the value at the end of each bar. Q is the longest bar and S is too short to see well.