Verbal Reasoning - Mental Ability Questions

The correct order is :   

Newly married Couple     Family    Caste    Clan    Species

                      3                        2                1             4             5

E is the daughter of A and F is the mother of E. So, A is the father of E and hence the husband of F. Now, 

D is the daughter of F. So, D and E are the daughters of A and F Also. A is the son of C. 

Now, only B remains. Thus, B and C are the parents of A. 

The sex of B and C cannot be determined: 

The first digit is formed by adding the numbers which are the results of powers of 2 increased by one and second letter is the corresponding alphabet to that number...last number is the next number to the first one...therefore

15=7+8 (i.e. 2^3)

O is corresponding alphabet to 15

and 16 comes after 15 

My mother's mother — My grandmother: My grandmother's only son — My maternal uncle. So, the woman is man's niece. 

Meaningful words are ROSE, SORE and EROS.

Note the meaning of the words SORE and EROS with the help of dictionary.