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Q: लेंस की शक्ति 4D पर फोकल लंबाई है

  • 1
    20 सेमी
  • 2
    25 सेमी
  • 3
    50 सेमी
  • 4
    400 सेमी
  • Show Answer
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Answer : 2. "25 सेमी"

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