Magnetism and Gauss's Law

The net magnetic flux through any closed surface is:

Statement (I) : A bar magnet exerts a torque on itself due to its own filed.

Statement (II) : Magnetic field lines can be entirely confined within the core of toroid.

Statement (III) : The net magnetic flux through any closed surface is zero.

Which of the following is correct?

The net magnetic flux through any closed surface, kept in a magnetic field is

$\oint \overrightarrow{B}·d\overrightarrow{s}=0$ equation is not according to the following

Gauss law for magnetism states that the magnetic flux through any closed surface is equal to the magnetic charge enclosed by the surface divided by permeability. 

Magnetic flux through a closed surface is always zero.

State Gauss' law for magnetism.

Magnetic flux through a closed surface is always zero.

Gauss law for magnetism states that the magnetic flux through any closed surface is equal to the magnetic charge enclosed by the surface divided by permeability. 

Assertion: The net magnetic flux coming out of a closed surface is always zero.

Reason: Unlike poles of equal strength exist together.