1.

The correct starting material and product of different disintegration series are

Answer»

`Th^(232) , Pb^(208)`
`U^(235) , Pb^(207)`
`U^(238) , Pb^(207)`
`NP^(237) , Bi^(209)`

Solution :`U^(238) , Pb^(207) implies` not belongs to any SERIES .


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