A) 200
B) 199
C) 83
D) 198
Correct Answer: C
Solution :
\[_{84}{{X}^{202}}{{\xrightarrow{\alpha -decay}}_{82}}{{Y}^{198}}{{+}_{2}}H{{e}^{4}}\]and \[_{82}{{Y}^{198}}{{\xrightarrow{\beta -\text{decay}}}_{83}}{{Z}^{198}}{{+}_{-1}}{{\beta }^{0}}\]
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