Answer: B) Zone II 5th Metatarsal Base Fracture (Jones Fracture)

Zone II 5th Metatarsal Base Fractures (Jones Fracture):

• Located at the "metaphyseal-diaphyseal junction" or "proximal diaphysis" of the 5th metatarsal
• The fracture involves or is directed towards the 4th-5th metatarsal articulation
• Mechanism: Usually from extreme forefoot adduction. Can be from direct trauma.
• Increased risk of nonunion due to vascular supply to area
• Treatment: NWB for 6-8 weeks. Possible surgical fixation depending on displacement.

For a high-yield review of all 5th metatarsal base fractures check out: Orthobullets: 5th Metatarsal Base Fracture

References:
1. Weatherford, B. "5th Metatarsal Base Fracture." Foot and Ankle: Mid and Forefoot Trauma. Orthobullets. 2016.