Axillary sheath is an extension of-
Ans. is 'b' i.e., Prevertebral layer of deep cervical fascia 'Axillary sheath and fascia around trunk of brachial plexus are derived from prevertebral fascia (prevertebral layer of deep cervical fascia).'
Pretracheal fascia
Prevertebral layer of deep cervical fascia
Investing layer of deep cervical fascia
None
Upper Extremity