Consider the following elements and their electronic configurations

W: 1s²2s²

X: 1s ²2s²2p⁶

Y: 1s²2s²2p⁶3s²

Z: 1s²2s²2p⁶3s²3p². Which of the elements belong to the same group in the periodic table?

• A W and X only
• B Y and Z only
• C W and Y only
• D W, Y and Z only