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निम्नलिखित में से कौन-सा बोरेक्स है?A. `Na_(2)B_(4)O_(7). 4H_(2)O`B. `Na_(2)B_(4)O_(7) . 10H_(2)O`C. `NaOH. B_(2)O_(3)`D. `Ca_(2)B_(6)O_(11). 5H_(2)O`

Answer» Correct Answer - B


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