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#29848 Bangla Language & Literature Number System Level 0

If m and n are positive integers, which of the following must be an even integer?

  1. A (m - 1)(n - 2)
  2. B (n - 1)m
  3. C n(m - 1)
  4. D n(n - 1)(m - 1)
Answer: D - n(n - 1)(m - 1)

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