<prompt> It is true regarding the normal microbial flora present on the skin and mucous membranes that ?It cannot be eradicated by antimicrobial agentsIt is absent in the stomach due to the acidic pHIt establishes in the body only after the neonatal periodThe flora in the small bronchi is similar to that of the trachea  <response>: Ans is a i.e., It cannot be eradicated by antimicrobial agents . The normal microbial flora are more or less constant for each species and are broadly divided into residents and transients. The former constitute a constant population which cannot be completely removed permanently. - Ananthanarayan 7e 599 . Because of low pH of stomach, it is viually sterile except soon after eating - Ananthanarayan 714 601 . With in 4-24 hours of bih an intestinal flora is established - Ananthanarayan re 600 . In the pharynx and trachea, flora is similar to that of mouth, while smaller bronchi and alveoli are normally sterile - Ananthanarayan 7the 600 