Which groups of the modern periodic table together constitute the s-block?

1. The table is divided into s, p, d and f blocks. 2. The s-block consists of groups 1 and 2. 3. Groups 13-18 form the p-block; groups 3-12 form the d-block. 4. Rule out B and C, which describe the p-block and d-block respectively. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.30_