Which of the following does not belong t...

Which of the following does not belong to the same homologous series ?

A

`""_(91)^(235) Pa`

B

`""_(90)^(232) Th`

C

`""_(92)^(238) U`

D

`""_(88)^(237) Ra`

Verified by Experts

The correct Answer is:

A, D

`(4 n + 3)` series `implies Pa""_(91)^(235) , Ra""_(88)^(227)`

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