All important derivations of class 12

1.	All important derivations of class 12
Answer» ???<br>I think so that its mars<br>Kaun si duniya mai hai aap?????yeh 2019 chal raha hai......aap earth pr hai..........pta hai??????????<br>Its 11 ??<br>it\'s 11th ???<br>class 12 ka derivations ? ??

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