The answer would be C) 62.
First you have to find the angle of g.
Angle g and 107 have to equal 180 because it makes a straight line. 180-107=73
Because angle g and angle b are vertical angles they equal the same. So now you know two angles within the triangle. You add up 73+45=118. You then subtract 180-118 because all angles in a triangle equal 180. 180-118=62
Hope this helps