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Ruby negi Best Answer
take a1,a2,a3 from first , second, third row and then again take a1,a2,a3 outside matrix from 1st,2nd,3rd colum and u will get a [1,1,1;1,1,1;1,1,1] matrix multiplied by squre of a1a2a3 and u know, eigen value of this [1,1,1;1,1,1;1,1,1 ]matrix ki (0,0,1*3 )multiplied by square of a1a2a3
option d is correct