Anatomy Posterior cord of brachial plexus is formed by? A Ventral division of upper trunk B Dorsal division of upper trunk C Ventral divisions of upper, middle & lower trunks D Dorsal divisions of upper, middle & lower trunks 💡 Explanation Posterior cord of brachial plexus is formed by? ✓ Correct Answer: D. Dorsal divisions of upper, middle & lower trunks