Which of these sets of numbers is not an addition / subtraction fact family? A. 1,2,3 B.2,3,5 C. 2,4,6 D. 3,4,5

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?