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Q: यदि a : b = 2 : 3 और a : c = 10 : 21, तो b : c क्या है?
  • A. 5 : 7
  • B. 15 : 14
  • C. 14 : 15
  • D. 7 : 5
Correct Answer: Option A -
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Explanations:

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