Electric Field Lines

The figure shows the electric field lines around three-point charges $\mathrm{A}, \mathrm{B}$and $\mathrm{C}$. In which region or regions of the picture could the electric field be zero? Justify your answer.

The figure shows the electric field lines around three-point charges $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$. Which charge has the largest magnitude?

Figure shows the electric field lines around three point charges $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$. Which charges are positive?

Sketch the electric field lines for a uniformly charged hollow cylinder shown in figure -

A metallic spherical shell has an inner radius ${\mathrm{R}}_1$ and outer radius ${\mathrm{R}}_2$. A charge $\mathrm{Q}$ is placed at the center of the spherical cavity. What will be surface charge density on $\left(\mathrm{i}\right)$ the inner surface, and $\left(\mathrm{ii}\right)$ the outer surface?

The figure shows electric field lines in which an electric dipole $\mathrm{p}$ is placed as shown. Which of the given statement is correct ?