Which is a counter example to the conjecture? the product of any two consecutive integrs is a composite number. a. 3x4=12 b. 30x31=930 c. 1x2=2 d. 10x11=110

The counter-example is 1  × 2 = 2a counter-example is used to give some instance where a conjecture fails.1 multiplied by 2 results in 2. 1 and 2 are consecutive integers, yes, but 2 is a prime number and it is not composite. so this conjecture is not always true.this is a counter-example: we used the conditions to get a contradictory outcome  to this conjecture  of "the product of any two consecutive integers is a composite number".

Multiplication property of zero