Are the following two matrices inverses of one

another? (Urgent please help)
A=[ 4 2] B= [ -4 -2]
[-11 -6] [ 11 7]

a)Yes, because they are opposites.
b)Yes, because their product is equal to the
identity matrix
c)No, because they are not opposites.
d)No because their product is not equal to the matrix

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