Constrictions in esophagus are present at distance of (from incisor) -a) 12 cmb) 25 cmc) 28 cmd) 36 cme)  40 cm
There are 4 esophageal constrictions. They are at 15cms, 22.5cms, 27.5cms and 37.5 to 40 cms, from the incisors.
ac
Only b
be
ae