This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Transovarian transmission is seen in which infection - 
Select and explain. 
A. Plague, B. Filarial, C. Guinea, D. Rocky Mountain spotted fever
D: Rocky Mountain spotted fever
Answer: D: Rocky Mountain spotted fever 
Explanation: Transovarial transmission is done by Ticks. Tick born disease above is RMSF caused by Rickettsia rickettsii REF: PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 840