Consider the following statements.
I The magnetic field lines of a magnet (or a solenoid) form continuous closed loops. This is unlike the electric dipole where these field lines begin from a positive charge and end on the negative charge or escape to infinity.
II The tangent to the field line at a given point represents the direction of the net magnetic field B at that point.
III. The larger the number of field lines crossing per unit area, the stronger the magnitude of the magnetic field B.
IV. The magnetic field lines intersect each other. Which of the following statements are correct?

Options

A. I, II and IV
B. I, III and IV
C. II, III and IV
D. I, II and III

Answer

D