A) \[_{21}C{{a}^{42}}\]
B) \[_{20}S{{c}^{42}}\]
C) \[_{21}S{{c}^{42}}\]
D) \[_{21}S{{c}^{41}}\]
Correct Answer: C
Solution :
\[_{20}C{{a}^{42}}{{\to }_{21}}S{{c}^{42}}{{+}_{-1}}{{e}^{0}}\]
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