This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Asphyxia, Subject name: Forensic Medicine
Ideal tissue for diatom study - 
Select and explain. 
A. Bone marrow of femur, B. Lung, C. Liver, D. Brain
A: Bone marrow of femur
Answer: A: Bone marrow of femur 
Explanation: Reff: The synopsis of forensic medicine & Toxicology 28th edition pg: 194 Only in living body the diatoms are found in bone marrow, brain, liver and skeletal muscle etc. its also found in bile and urine etc. bone marrow is highly suitable and reliable after cutting the bone the marrow is curetted from the gutter.The bone marrow of long bones, such as the femur, tibia, humerus or sternum is examined.