Correct answer is (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
Assertion (A) is true: All kitchen waste cannot form compost. For example, meat, fat, and dairy products can attract pests and diseases, and can also make the compost smell bad. Additionally, some food packaging materials, such as plastic and milk packets, are not biodegradable and cannot be composted.
Reason (R) is also true: Material like milk packets may not be biodegradable. Milk packets are typically made of a combination of paper, plastic, and aluminum. While the paper component is biodegradable, the plastic and aluminum components are not.