23 H K O H
2 is the first number and difference between 3rd and 2nd number is equal to first number. Hence in option (c), the same follows i.e., difference between 3rd and 2nd Number is 3, which is first number.
Second number is the reverse of the first number.
Second number is the next prime number to the first number.
In all others, 2nd number = (2 x 1 st number) + 2
In all other numbers the sum of the digits is 17.
All others are divisible by 6.
Except 44, all are prime numbers.
All others are flowers.
(08)2 + 2 = 66
(06)2 + 2 = 38
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