<prompt> True about sternal angle -Xiphisternal jointAtT6.7 levelArticulates with 2nd costal cartilageNone of the above  <response>: Ans. is c i.e., Articulates with 2nd costal cartilageo Sternal angle of Louis is man uhriosternal joint not xiphisternal joint,o It is at the level of T4 -T5 intervertebral space,o 2nd costal cartilage articulates at sternal angle 