Final answer:
Gray baby syndrome is caused by the antibiotic chloramphenicol.
Step-by-step explanation:
Gray baby syndrome is caused by the antibiotic chloramphenicol. Chloramphenicol is a broad-spectrum antibiotic that was historically used to treat various infections, including conjunctivitis.
However, its clinical use is now limited due to serious side effects, such as gray baby syndrome and suppression of bone marrow production.