Which of the following is the negation of statement “a*b = b*a for every real number a and b”?

There exists real number a and b for which a*b = b*a

a*b ≠ b*a for every real number a and b

a*b = b*a for every real number a or b

There exists real number a and b for which a*b ≠ b*a

There exists real number a and b for which a*b = b*a

Which of the following is the negation of statement “a*b = b*a for

1.	Which of the following is the negation of statement “ab = ba for every real number a and b”?
A.	ab ≠ ba for every real number a and b
B.	ab = ba for every real number a or b
C.	There exists real number a and b for which ab ≠ ba
D.	There exists real number a and b for which ab = ba
Answer» D. There exists real number a and b for which ab = ba