Answer: The correct answer is option (B).
Explanation:
When a pair of balanced forces acts on an object that two equal forces are action on an object in opposites direction.
Suppose, an force[tex]F_a[/tex] and [tex]F_b[/tex] are acting on an object in opposite direction.
[tex]F_a=-(F_b)[/tex]
The net force acting on the object :
Net force = [tex]F_a+F_b=F_a+(-F_a)=0[/tex]
Hence, the correct answer is option(B).