The relation between $\lambda$ and $T_{1/2}$ is ($T_{1/2} = \text{half-life}$,$\lambda = \text{decay constant}$)

• A
  $\left(\lambda + T_{1/2}\right) = \frac{\ln 2}{2}$
• B
  $T_{1/2} = \frac{\ln 2}{\lambda}$
• C
  $T_{1/2} \cdot \ln 2 = \lambda$
• D
  $T_{1/2} = \frac{1}{\lambda}$