Suppose This Page Is Perpendicular to a Uniform Magnetic Field $\degree$

Multiple Choice

Suppose this page is perpendicular to a uniform magnetic field and the magnetic flux through it is 5 Wb. If the page is turned by 30 $\degree$ around an edge the flux through it will be:

A) 2.5 Wb
B) 4.3 Wb
C) 5 Wb
D) 5.8 Wb
E) 10 Wb