When the position vector \(\vec{r}=\text{ }x\overset{^}{i}\text{ }+\text{ }y\overset{^}{j}+z\overset{^}{k}\) changes sig…

When the position vector \(\vec{r}=\text{ }x\overset{^}{i}\text{ }+\text{ }y\overset{^}{j}+z\overset{^}{k}\) changes sign as \(−\vec{r},\) which one of the following vector will not flip under sign change?