Which of the following is a compound noun?

♦ Compound Nouns:
- A compound noun is a noun that is made with two or more words.
- অর্থাৎ দুই বা ততোধিক শব্দ নিয়ে যে noun গঠিত হয় সেগুলোকে compound noun বলা হয়।
- A compound noun is usually [noun + noun] or [adjective + noun], but there are other combinations. Each compound noun acts as a single unit and can be modified by adjectives and other nouns.

• There are three main types of compound nouns:

1. open or spaced - space between words (Cricket bat)
2. hyphenated - hyphen between words (By-product)
3. closed or solid - no space or hyphen between words (Classroom)

Options,
- band: Collective noun