4 Using Cofactors of elements of third column, evaluate ∆ = 
1
1
1
x
yz
y
zx
z
xy 5 If ∆ = 
11
12
13
21
22
23
31
32
33
a
a
a
a
a
a
a
a
a
 and Aij is Cofactors of aij, then value of ∆ is given by
(A)
a11 A31+ a12 A32 + a13 A33
(B)
a11 A11+ a12 A21 + a13 A31
(C)
a21 A11+ a22 A12 + a23 A13
(D)
a11 A11+ a21 A21 + a31 A31
4