From statement I: A is husband of B. M is parent of B. B is mother of R. There is no information about R’s siblings. From statement II: M is father of A and R. S is wife of M. Gender of A and R is not known. So, there is no conclusion about R’s brother. Combining I and II: Data are inadequate to combine both the statements. Hence, data even in both statements I and II together are not sufficient to answer the question.