Question 1132964
10/43 or 23.3% treated
2/46 or 4.3% control

at first glance, d is the best answer.
For the last question, b is the best answer.  It is entirely possible that there is a real pain reduction, but the way to find out is to either to a Chi-Square test on the data, not compare percentages. With small sample sizes, this could be random error.