Which one of the following options regarding the binary operation * is FALSE? binary operations
a. (a * b) * (c * d) = (a * (b * d)) * (d * c)
b. (a * b) ≠ (b * a) can be used as a counterexample to prove that the binary operation * is not commutative.
c. (a * b) * d = a * (b * d) proves that the binary operation * is associative.
d. The binary operation * does not have an identity element.