Which of the following statement is not correct?

Options

A. The first ionisation energies (in kJ `"mol"^(-1)`) of carbon, silicon, germanium, tin and lead are 1086, 786, 761, 708 and 715 respectively.
B. Down the group, electronegativity decreases regularly from B to Tl in boron family
C. Among oxides of the elements of carbon family, CO is neutral, `GeO_(2)` is acidic and SnO is amphoteric.
D. The 4f-and 5f-inner transition elements are placed separately at the bottom of the periodic table to maintain its structure.

Answer

B