This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Romana's sign is seen in? 
Select and explain. 
A. Toxoplasma, B. Trypanosoma cruzi, C. Loa loa, D. Wuchereria
B: Trypanosoma cruzi
Answer: B: Trypanosoma cruzi 
Explanation: Ans. (b) Trypanosoma cruzi Romana sign, also known as chagoma, refers to periorbital swelling, palpebral oedema and conjunctivitis seen 1-2 weeks following infection with Trypanosoma cruzi (causative agent in Chagas disease). Romana sign is associated with ipsilateral regional lymphadenopathy. History and etymology It is named after Cecilio Felix Romana (1899 - 1997), Argentinian physician, who first described the phenomenon.