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In the following question, select the odd number pair from the given alternatives.

  • A.4 : 18
  • B.7 : 51
  • C.9 : 83
  • D.6 : 34

Answer: D

Correct answer: 6 : 34

In each pair the second number is the square of the first plus two: \( 4^2+2 = 18 \), \( 7^2+2 = 51 \), \( 9^2+2 = 83 \). For 6 the rule gives \( 6^2+2 = 38 \), not 34 - so 6 : 34 is the odd pair.

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