Which of the following characteristics is correct for reptilia?

• A. Body covered with dry and comified skin, scales over the body are epidermal, they do not have external ears.
• B. Body is covered with moist skin and is devoid of scales, the ear is represented by a tympanum, alimentary canal,
• C. urinary and reproductive tracts, open into a common cloaca. Fresh water animals with bony endoskeleton and air-bladder regulate buoyancy.
• D. Marine animals with cartilaginous endoskeleton and body is covered with placoid scales.