The answer is all of these
        
                    
             
        
        
        
Pulmonary valve - connects right ventricle and pulmonary trunk (which divides into right and left pulmonary arteries). It is a semilunar valve
        
             
        
        
        
The given statement is true.  
The majority of the chronic diseases are not accredited to a single cause, some of the poor lifestyle choices like overuse of alcohol, smoking, lack of physical activity, poor diet, and insufficient relief of chronic stress are the major contributors in the advancement and development of preventable chronic ailments, like type 2 diabetes, obesity, cardiovascular disease, hypertension, and many kinds of cancer.  
 
        
                    
             
        
        
        
Answer:
James Watson and Francis Crick solved the structure of DNA. Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.
Explanation:
 
        
                    
             
        
        
        
Sterile water is most often used