The logic here is
16 - 13 = 3
22 - 19 = 3
24 - 21 = 3
38 - 33 = 5
In all number pairs except 33 - 38, difference between the numbers is 3.
$$\therefore\ $$33 - 38 is the odd number pair among the given number pairs.
Hence, the correct answer is Option D
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