(A) Letter head
(B) Page size
(C) Print resolution
(D) None of these
🧠 Explanation:
- A3 refers to a specific **page size** used in printing and document formatting.
- It is part of the ISO 216 standard and measures **297 x 420 mm**, which is larger than A4.
- A3 pages are commonly used for **design layouts, diagrams, and large spreadsheets**.
- It is not related to letterheads or print resolution, but strictly to paper dimensions.