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Answer : 2 4 Explanation : Answer: B) 4 Explanation: The 2nd, 5th and 8th digits of the number 31549786 are 1, 9 and 6 respectively. The perfect square of a two - digit even number, formed using the digits 1, 9 and 6 is 196.And,  14 x 14 = 196  So, the required even number is 14. Clearly, its second digit is 4. Hence, the answer is (b).

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