The correct option is A First match
Clearly, it can be seen that runs scored in the first match are much more than the total runs scored in either second match or third match. Though the number of overs actually played is almost similar in all the three matches - 45, 48 Overs in second match and 44 Overs in third match.
Since numerator (Total runs scored) is maximum in case of 1st match whereas denominator is almost similar, Average Runs per over will be maximum for first match.
Hence option (a) is the answer.