Definition of consistency

An estimator $T_n$ is consistent for $\gamma(\theta)$ under which of the following?

I. $T_n$ is unbiased for $\gamma(\theta)$

II. $V(T_n)\le1$

III. $T_n\overset{P}{\longrightarrow}\gamma(\theta)$

IV. $\dfrac{T_n}{n}\overset{P}{\longrightarrow}\gamma(\theta)$

Select the correct answer using the code given below.