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