Which of the following statements is not correct

Options

A. The first ionization energies in `("kJ mol ^(-1))` of carbon , silicon , germanium , tin and lead are 1086 , 786 , 761 ,708 and 715 respectively
B. Down the group , ionization energy decreases regularly from B to T1 in boron family
C. Among oxides of the elements of carbon family , CO is neutral , GeO is acidic and SnO is amphoteric.
D. The 4f and 5f - inner transition elements are placed separately at the bottom of the periodic table

Answer

B