A 25 years old female complains of recurrent rhinitis, nasal discharge and bilateral nasal blockage since one year. She has a history of asthma and allergy. On examination, multiple ethmoidal polyps are noted with mucosal thickening and impacted secretions in both the nasal cavities. A biopsy is taken and the material is cultured which show the growth of many hyphae and pseudohyphae with dichotomous branching typically at 45°. Which of the following is the most likely responsible organism?