This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tuberculosis, Subject name: Medicine
This miliary pattern in CT scan can occur due to spread from? 
Select and explain. 
A. Lymphatics, B. Bronchial vein, C. Pulmonary aery, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Miliary pulmonary disease Miliary systemic disease It occurs in primary progressive pulmonary TB when organisms in the draining lymph nodes erode into the pulmonary aeries. This distributes the infection to both lung fields. Once the infection in the lung reaches the pulmonary vein the bacteria can reach the left side hea. Subsequently, they can seed organs like liver and spleen