One of the statements is incorrect, which one?
A) 8321 = 1103
B) 7829 = 1511
C) 4995 = 1013
D) 3878 = 1115

Letter C

Because if you add 4 + 9 in 4995 it gives 10 (13 is correct) and if you add 9 + 5 it gives 13 (14 is correct)