Correct option is D
Given: 12496, 12448, 12424, (?)
Logic: Difference of two consecutive numbers is decreasing by 48, 24, 12,....
12496 - 12448 = 48,
12448 - 12424 = 24,
12424 - ? = 12
? = 12412
So, 12412 is the missing term in the series.
Thus, the correct answer is (d).