Four options are given below. Three of these options are similar to each other because they follow the same pattern. Identify the option that is dissimilar to the other three ?

Answer : C. AD6

Four options are given below. Three of these options are similar to each other because they follow the same pattern. Identify the option that is dissimilar to the other three ?

A. AE6

B. FD10

C. AD6

D. DE9

Answer : C. AD6

Explanation

The general sequence is :
Position of the first letter in the alphabet sequence + Position of the second letter in the alphabet sequence = the number at the end of each term.

Thus, AE6 => 1 + 5 = 6
FD10 => 6 + 4 = 10
DE9 => 4 + 5 = 9
Going by this logic, AD6 does not fit the sequence. It should have been AD5 (1 + 4 = 5).
Therefore, the option that is dissimilar to the other three is AD6.

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