(I). A, B, C, D, E and F are six members of a family. (II). One couple has parents and their children in the family. (III). A is the son of C and E is the daughter of A. (IV). D is the daughter of F who is the mother of E.
Which of the following pairs is the parents of the children ?
Choose the correct alternative from the following : - Assertion (A) : An iron ball floats on mercury but gets immersed in water. Reason (R) : The specific gravity of iron is more than that of mercury.