The correct option is B $$10N$$ $$m$$ (anti clockwise)
As we have to find the moment of force about O with respect to first force for which the perpendicular distance is $$2 m$$. We have a magnitude of force $$5 N$$. We know that moment of force given by formula $$r \times F = 2\times5\ N-m$$.
Hence there is a magnitude of $$10 N-m $$ moment of force.
If the fingers of the right hand are curled from the direction of r towards the direction of F then the thumb points the direction of torque. Hence it is anti-clockwise in direction with $$10 N-m$$.