The correct option is C A−3,B−1,C−4,D−2
Duodenum is a 'C' shaped structure emerging from the stomach.
Epiglottis is a cartilaginous flap that prevents the entry of food into the wind pipe.
Glottis is the opening of the wind pipe.
Caecum is part of large intestine and is a small blind sac which hosts some symbiotic microorganisms.