Answer:
Option B, no
Explanation:
Some embolisms, or abnormal blood clots, such as those that become lodged in the vasculature on the lower extremities, like in the calves, can be visualized through the skin's surface. This is referred to as deep vein thrombosis (DVT). The skin surrounding the blood clot may have a different temperature than the rest of the body and may appear as if it has reddish streaks.
There are, however, emboli that cannot be visualized using normal vision and therefore require diagnostic tests and imaging in order to see. These can include coronary artery embolism that cause myocardial infarction (MI) or heart attack; pulmonary embolism (PE) that can lead to peripheral edema and right-sided heart failure known as cor pulmonale; cerebral embolism which can lead to ischemic strokes; and other visceral embolisms that can cause organ dysfunction.
Not being able to see an embolism does not mean the occlusion does not exist, and often these emboli, cannot be visualized without further examination. Thus, the answer to the given statement is no, option B.
