Final answer:
Silicosis is also known as grinder's disease, option A, and is a type of pneumoconiosis caused by inhaling silica dust.
Step-by-step explanation:
Silicosis is an occupational lung disease caused by inhaling silica dust, which causes inflammation and scarring in the lungs. It is also known as grinder's disease, which is option A. This condition is a type of pneumoconiosis, which is a broad category of lung diseases caused by the inhalation of different types of dust. Hypersensitivity pneumonitis, mentioned as a related condition, is an allergic reaction in the lungs due to inhaled particles, but is distinct from silicosis. Whooping cough, also known as pertussis, and croup are respiratory conditions caused by infections and not occupational exposure, eliminating options B, C, and D.