I am not sure either...there are so many things in my mind right now, each leading to different answer..
1) It can be A:
Moment of a force = force X perpendicular distance
Moment of a force = 2sin50 X 0.15 = 0.23 Nm
2) It can be C:
Two forces acting simultaneously, thus two moments = 2 X 0.23 = 0.46 Nm
3) It can be D:
My book (International A/AS level Physics - CIE endorsed) says -
The torque of a couple is the product of one of the forces and the perpendicular distance between the forces
Therefore, according to this, Torque = 2 X 0.15 = 0.60 Nm
Fortunately, I don't have any idea about B, or else I'd be dead =.=
Someone please help me!!