If P × Q means P is the mother of Q, and Q + R means Q is the brother of R, what is the relationship between P and R?

B. MOTHER

In a family of six members A, B, C, D, E, and F, there are two males and four females. A is a teacher, B is a doctor, C is the mother of D, D is the son of E, and F is the sister of A. How many males are there in the family?

A. 2

If the sequence is A, C, E, G, what is the next letter?

B. H

In a certain code, 'DOG' is coded as '47', 'CAT' is coded as '24'. What is the code for 'BAT'?

A. 12

In the series A, B, C, D, E, F, how many times does the letter 'E' appear?

A. 1