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In the nuclear reaction ""(92)U^(238) to...

In the nuclear reaction `""_(92)U^(238) to ""_(z)Th^(A) + ""_(2)He^(4)`, the values of A and Z are

A

A=234, Z=94

B

A=234, Z=90

C

A=238, Z=94

D

A=238, Z= 90

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