Which of the following plastics can be recycled?

Options

A. melamine
B. polyethylene
C. bakelite
D. Both (a) and (b)

Explanation

To determine which plastics can be recycled, we need to understand the types of plastics and their properties. Let's break down the solution step by step.

### Step-by-Step Solution:

1. **Identify the Types of Plastics**:
- Plastics are categorized into two main types: thermoplastics and thermosetting plastics.
- Thermoplastics can be melted and reshaped multiple times, while thermosetting plastics cannot be remolded once set.

...