The correct answer to the question is Pulmonary edema.
Pulmonary edema refers to the accumulation of fluid in the tissue of the lungs. It is often caused when heart function declines, and fluids fill spaces of the lungs. It is mostly caused by heart failure. In heart failure, the heart is unable to pump blood efficiently; this blood will be back up in the veins of the lungs. As the pressure in the veins increase, fluid is pushed into the lungs.
Option B is incorrect. Pulmonary embolism refers to the obstruction of the pulmonary artery, usually by a detached blood clot from the leg or pelvic vein.
Option C is also incorrect. Tuberculosis (TB) is an infectious disease that affects the lungs. It causes expectoration of mucus, sputum, fever, weight loss, and chest pain. Pneumothorax is a medical term that describes the collection of air in the chest around the lungs.