<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 64-year-old man is brought to the emergency department because of fever, chills, shortness of breath, chest pain, and a productive cough with bloody sputum for the past several days. He has metastatic pancreatic cancer and is currently undergoing polychemotherapy. His temperature is 38.3C 101F. Pulmonary examination shows scattered inspiratory crackles in all lung fields. A CT scan of the chest shows multiple nodules, cavities, and patchy areas of consolidation. A photomicrograph of a specimen obtained on pulmonary biopsy is shown. Which of the following is the most likely causal pathogen?? A: Mycobacterium tuberculosis, B: Aspergillus fumigatus, C: Histoplasma capsulatum, D: Pneumocystis jirovecii, E: Rhizopus oryzae,  <response>: This is a patient with metastatic pancreatic cancer undergoing chemotherapy who now presents with fever, respiratory symptoms, and a productive cough with bloody sputum. The description of CT findings showing nodules, cavities, and patchy consolidations along with the photomicrograph showing acute angle branching hyphae are consistent with an angioinvasive fungal infection. Aspergillus fumigatus is the most likely pathogen in immunocompromised patients who present with these findings. Mycobacterium tuberculosis would not present acutely and with angioinvasion. Histoplasma capsulatum is a possibility but is less likely than Aspergillus. Pneumocystis jirovecii and Rhizopus oryzae would not cause cavitary lesions.B: Aspergillus fumigatus 