Is a Daily Dose of 500 Milligrams for 50 Days Recommended?

A 76 year old mail sustains a minimumly displaced, distal radious fracture and undergoes close treatment with a cast. Four months post injury, he presents the office with an inability to extend his thumb. Which of the following injuries is the most likely cause of this finding? And the choices are, one, extensor polysis, brevis rupture. Two, posterior interacis, nerve palsy. Three, adhesions within the first and third dorsal risk compartments. Four, dorsal wrist, septictinus and vitus. And five, extensor palysis, longest rupture.