This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
Inhalation of asbestosis particle of 15 micro meter will cause: 
Select and explain. 
A. Mesothelioma, B. Ca liver, C. Ca larynx, D. Ca colon
A: Mesothelioma
Answer: A: Mesothelioma 
Explanation: Ans: A (Mesothelioma) Ref: Robbins, 7 ed, p. 768-769Exposure to asbestosis is associated with incidence of malignant pleural tumours (mesothelioma)Types of asbestosis:Serpentine (curly and flexible fibres) e.g.: chrysoliteAmphibole (straight stiff and brittle) e.g.: crocidolite.Amphiboles are more pathogenic than chrysolitesThe greater pathogenicity of amphibole is apparently related to their aerodymanic properties and solubility. The straight stiff amphiboles may align themselves in the airstream and delivered to the deeper long tissues, where they can penetrate epithelial cells and reach interstitium.Length of amphibole also play a role in pathogenicity, those longer than 8 micro meter and thinner than 0.5 micrometer being more injurious than shorter thicker ones.