If two samples are used in a hypothesis test for which the combined degrees of freedom is 24, which one of the following is NOT true about the two sample sizes?

a. Sample A = 11; sample B = 13

b. Sample A = 12; sample B = 14

c. Sample A = 13; sample B = 13 (marked as incorrect)

d. Sample A = 10; sample B = 16

e. Cannot determine from the above information