Quote:
Originally Posted by CHOUDHARY168
Main nay hydrogen likha hai but I think key main nitrogen ho ga.
Reason is that Carvan ki book main nitrogen hai aur mostly paper usi book main say hai.
Let see what happened!
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carvan sy paper tha mostly laikin carvan ki book mein kai ghaltian bhi hein.answer hydrogen hi hy sab books mein yai ans hy.