Which of the following figure represents the electric field lines due to a single positive charge?

A few electric field lines for a system of two charges $Q_1$ and $Q_2$ fixed at two  different points on the $x$ -axis are shown in the figure. These lines suggest that:-

Consider a uniform electric field $E =3 \times 10^{3} i\; N / C .$

$(a)$ What is the flux of this field through a square of $10 \;cm$ on a side whose plane is parallel to the $y z$ plane?

$(b)$ What is the flux through the same square if the normal to its plane makes a $60^{\circ}$ angle with the $x -$axis?

A charge $q$ is placed at the centre of the open end of cylindrical vessel. The flux of the electric field through the surface of the vessel is

If a spherical conductor comes out from the closed surface of the sphere then total flux emitted from the surface will be

Five charges $+q,+5 q,-2 q,+3 q$ and $-4 q$ are situated as shown in the figure.

The electric flux due to this configuration through the surface $S$ is