In a diagram of the field around a bar magnet, region I contains 10 field lines passing through an area of 1cm2 while region II contains 4 field lines through the same area. Which statement is correct about the magnetic field strengths in the two regions?
a) Field strength cannot be compared solely from the number of lines drawn.
b) Both regions have equal magnetic field strength.
c) The field in region I is stronger than in region II.
d) The field in region II is stronger than in region I.