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1.

  • A. ৩ N
  • B. ৩ N
  • C. ৩ N
  • D. ৩ N

Answer: Option C

Explanation:

লব্ধি,= √(p2-q2)
      = √[(5n)2+(4n)2]
      = √(41n2)
      =√41n

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