This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Which of the following is carrying agent for the disease with given characteristic on polarized microscopy 
Select and explain. 
A. Anopheles, B. Ixodes scapularis ticks, C. Louse, D. Rat flea
B: Ixodes scapularis ticks
Answer: B: Ixodes scapularis ticks 
Explanation: * Babesiosis infects the RBCs and resides inside the RBCs ( intraerythrocytic). * Intraerythrocytic infection of Babesiosis is characterised by maltese cross. * Maltese cross is a characteristic arrangement of parasites within the erythrocytes --->Parasites within erythrocytes are arranged such that pointed ends of four parasites come in contact thereby giving a tetrad configuration resembling a maltese cross. * Tetrad forms or &;Maltese cross&; appearance is considered pathognomic of Babesiosis. * Babesiosis can easily be confused with P. falciparum malaria.Following two features distinguish Babesiosis from malaria 1. Presence of maltese cross in Babesiosis ( absent in malaria) 2. Absence of pigment Hemozoin in Babesiosis ( present in malaria) REF : HARRISONS 21ST ED