A) At. No. 58 to 71
B) At. No. 21 to 30
C) At. No. 39 to 71
D) At. No. 81 to 91
Correct Answer: A
$ \underset{\begin{smallmatrix} , \\ Lanthanides \end{smallmatrix}}{\mathop{\text{Atomic no}\text{.58 to 71}}}, $ are rare earth metals.
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