A \( T_{\frac{1}{2}}=\frac{1}{\lambda} \)
B \( T_{\frac{1}{2}}=\frac{\lambda}{0.693} \)
C \( T_{\frac{1}{2}}=\frac{0.693}{\lambda} \)
D \( T_{\frac{1}{2}}=0.693 \lambda \)
Correct Answer: Option C
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