1.

Which of the following isotope is non-radioactive [DPMT 1982, 84]

A. \[{{C}^{14}}\]
B. \[{{P}^{31}}\]
C. \[{{H}^{3}}\]
D. \[{{S}^{35}}\]
Answer» C. \[{{H}^{3}}\]


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