Contents of posterior triangle of neck
Contents of posterior triangle of neck :

Occipital artery.
Spinal accessory nerve.
Subclavian vessels.
Trunks of brachial plexus.
Great auricular nerve, lesser occipital nerve, supraclavicular nerve, transverse cutaneous nerve.
External jugular vein.
Occipital artery, spinal accessory nerve, hypoglossal, ascending pharyngeal artery
Occipital artery, lesser occipital nerve, subclavian artery, spinal accessory nerve
Occipital artery, spinal accessory nerve, subclavian artery, hypoglossal nerve
Occipital artery, Lesser occipital nerve, ascending pharyngeal artery, vagus nerve