umankant biswal sir can you please tell me about ijso Olympiad .please answer soon sir I am waiting .is class 9 eledgible for that.

dear jahanavi 
kindly calculate , if u complete 15 years of age by class 9^th , then u are elligible , there will be no class limitation , only age barrier . 
and in case elligible , then kindly go ahead with registration purpose ,. the topic of ijso , 2017 will be water and sustainibility of resources (netherland ) 
this is a international type olympiad , 
full form – international , junior science olympiad . 
HOPE IT CLEARS 
REGARDS