Final answer:
Jaundice is characterized by yellow staining of tissues and is seen in infants with erythroblastosis fetalis and may accompany gallstone formation.
Step-by-step explanation:
Jaundice is the correct answer. Jaundice is characterized by yellow staining of tissues, such as the skin and mucous membranes, which is caused by an accumulation of bilirubin in the body. In infants with erythroblastosis fetalis, the condition is often seen due to the destruction of red blood cells and subsequent elevation of bilirubin levels in the blood. Jaundice can also accompany gallstone formation. The bile pigments, including bilirubin, cannot be excreted properly when there is a blockage, and they build up in the body, leading to yellow staining of the tissues.