The correct answer is (a) wear the brace in the form of socks or stiff shoes
For explanation I would say: Foot drop palsy happens when a person’s ankle muscles have lost strength or the tendon has been severely damaged. When a person suffering from foot drop palsy is walking, on raising their feet, the foot drops down completely. This can cause harm and to reduce this, a brace which holds the foot close to the calf at the normal position should be worn.