A 48 years old man, resident of Baroda outskirts near a textile mill presents to his family physician with respiratory symptoms. Doctor advices X-ray chest which showed - fine reticular & nodular pattern in lower zone with loss of clarity of diaphragm & cardiac shadows. He also doubts about the presence of small pleural effusion. The probable diagnosis is?
Stannosis Asbestosis Silicosis Coal worker's pneumoconiosis