a) Cling film
b) Plastic wrap
c) Saran wrap
d) Stretch film

Answer: d
Explanation: Stretch film is the odd one. Cling film, plastic wrap and saran wrap are the terms which denote a thin plastic film used for packaging of food. It is also known as shrink wrap and food wrap. Stretch film is used for wrapping secondary or higher forms of packaging. It can never be used as a primary packaging material.