Use quantifiers and predicates with more than one variable to express, There is a pupil in this lecture who has taken at least one course in Discrete Maths.

• A. x yP (x, y), where P (x, y) is x has taken y, the domain for x consists of all pupil in this class, and the domain for y consists of all Discrete Maths lectures
• B. x yP (x, y), where P (x, y) is x has taken y, the domain for x consists of all Discrete Maths lectures, and the domain for y consists of all pupil in this class
• C. x yP(x, y), where P (x, y) is x has taken y, the domain for x consists of all pupil in this class, and the domain for y consists of all Discrete Maths lectures
• D. x yP(x, y), where P (x, y) is x has taken y, the domain for x consists of all pupil in this class, and the domain for y consists of all Discrete Maths lectures