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. 
 
        
             
        
        
        
brain or nervous system cells are called as neurons
 
        
             
        
        
        
Answer:
increased energy is not a symptom of depression
 
        
                    
             
        
        
        
Answer:
1977 is when people first knew about archaebacteria