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9.    Assertion: Mountaineers suffer nose bleed on high mountains.                               1
                   Reason: Mountaineers have malnutrition.
         Subjective Questions:
            10.   Mention three factors affecting Air pressure.                                              3

            11.   Give reason :                                                                              2
                           a)  Mountaineers while tracking at higher altitude suffer nose bleeding.
                           b)  Mountaineers need to carry Oxygen cylinder on higher mountains.
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