In What Block, Group, and Period on the Periodic Table

Multiple Choice

In what block, group, and period on the periodic table can the atom with a 1s²2s²2p⁶3s¹ ground-state electron configuration be found? Paired item 1)

A) s-block, group 1A, and period 2
B) s-block, group 1A, and period 3
C) s-block, group 1A, and period 4