In the question there are four groups of numbers of which three are alike and one is different. Find the one which is diffrent
A
2165
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B
3478
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C
4397
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D
5296
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Solution
The correct option is C4397 Sum of digits of every option is an even number . While sum of digits of option (3) is 23. Also , number in option (3) is a prime number while others are composite numbers. Hence, option 'C' is correct.