Select the correct statements regarding current density

1) It is a vector quantity

2) Its SI units is  $\frac{A}{m^2}$

3) It’s dimensions are $M^0{L}^{-2}{T}^0{A}^1$ 

4) i =  $\int \overrightarrow{J}.d\overrightarrow{A}$

$i=\int J.A$

$$\begin{gathered} Current density is a vector quantity and is defined as the the current flowing \\ per unit area of cross section flowing perpendicular to cross section. \\ SI unit of current density is j = \frac{I}{area}= A / m 2 \end{gathered}$$

$It’s dimensions are M{ }^0 L^{-2} T^0 A^1$