Choose the correct statement for antinides.
A. Pa, U, Np, Pu and Cm have very sharp lines in the absorption spectra.
B. Spectral lines are ten times as intense as those from the lanthanides.
C. `Am^(2+)` exists only in the solid as the fluoride.
D. `Cf^(2+), Es^(2+), Fm^(2+), Md^(2+)` and `No^(2+)` exist as ions in solution.
