<prompt> Major constituent of surfactant is -Dipalmitoyl lecithineDipalmitoyl cephalineDipalmitoyl serineDipalmitoyl inositol  <response>: Ans. is a i.e., Dipalmitoyl lecithin o The major 65 constituent of surfactant is dipalmitoylphosphatidylcholine dipalmitoyl-lecithin; which is a phospholipid. 