In a family, there are a father, a mother, two sons, and a daughter. If the father is a teacher and the mother is a doctor, which of the following is true?

C. AT LEAST ONE SON IS NOT A TEACHER.

If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the mother of B, what is the relationship of C if A + B × C?

D. C IS A'S CHILD

Identify the missing letters in the series: b, d, f, h, ?

A. J

In a coded relation, if P ÷ Q means P is the father of Q, P - Q means P is the daughter of Q, and P + Q means P is the son of Q, what is the relationship of R if P ÷ Q + R?

C. R IS Q'S SON

If 'APPLE' is coded as 116312, what is the code for 'LEMON'?

A. 12141314