In JEE ADVANCED in multi correct type qns suppose in a question there are 3 options correct , a,b,c.....If i mark only a will i get any marks? If the question carries 3 marks will i get at least 1? If the question has negative marking will i get negative marks? Or will i get 0?.....Please help.....

@ abhimalya 
if its written in a question that its a multi correct option , then u have to mark all the correct answer , not a single option . 
if u will mark any one single option , u will get negative marks for that as it will count for incorrect attempt . 
u will get 0 if u leave that ques unattempted . 
HOPE IT CLEARS NOW 
ALL THE BEST