https://cssmcqs.com/if-a-b-means-a-is-the-brother-of-b-a-b-means-a-is-the-sister-of-b-and-a-x-b-means-a-is-the-father-of-b-which-of-the-following-means-that-c-is-the-son-of-m/
If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?