A) Lanthanoids
B) Actinoids
C) Lanthanoids and actinoids
D) Lipids
Correct Answer: C
Solution :
\[f-\]black series is divided into two series viz \[4f-\]series and\[5f-\]series. The members of\[4f\]series are called (anthanides or lanthanons whereas that of\[5f-\]series are called actinides or actinons.
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