P Block Elements

Evaluate the following statements related to group 14 elements for their correctness.

(A) Covalent radius decreases down the group from \(\mathrm{C}\) to \(\mathrm{Pb}\) in a regular manner.

(B) Electronegativity decreases from \(\mathrm{C}\) to \(\mathrm{Pb}\) down the group gradually.

(C) Maximum covalance of \(\mathrm{C}\) is 4 whereas other elements can expand their covalance due to presence of d orbitals.

(D) Heavier elements do not form \(\mathrm{p} \pi-\mathrm{p} \pi\) bonds.

(E) Carbon can exhibit negative oxidation states.

Choose the correct answer from the options given below :