Low blood pressure that occurs on standing up is known as ____.​ a. ​chronic venous insufficiency b. ​raynaud's disease c. ​leukopenia d. ​orthostatic hypotensi

The right option is d. ​Orthostatic hypotension

Orthostatic hypotension is a form of low blood pressure that occurs on standing up from sitting or lying down. It is caused as a result of blood loss, dehydration or aneamia. The most common symptom of orthostatic hypotension is lightheadedness or dizziness which usually last less than a few minutes.