The d-block elements of the modern periodic table are also known as:

1. The d-block spans groups 3 to 12 in the main body of the table. 2. These elements are collectively called the transition elements. 3. Alkali metals (group 1) and halogens (group 17) lie outside the d-block. 4. Rule out B: alkali metals are s-block, not d-block. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.30_