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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Deepak singh 1
see attached , all options are satisfying given condition but most general form is option c . if c1=0 and c2= 1 we get option a if c1= 1 and c2=0 we get option b if c1= 1 and c2= 1 we get option d .. so option c is most general form and is correct answer...