I believe that this is would be a difficult question because there are areas to which you may cross the line. I'd say that the last answer option is the safest. You are taking a photo which is a stationary object which only merely shows them speaking or expressing themselves, which can be vague.
Pulmonary surfactant<span> is a mixture of lipids and proteins which is secreted into the alveolar space by epithelial type II cells. The main </span>function<span> of </span>surfactant <span>is to lower the surface tension at the air/liquid interface within the alveoli of the </span>lung<span>.
Source: </span>http://www.sciencedirect.com/science/article/pii/S000527360000256X
Yes, a PFO can be fixed using a non surgical procedure causing it to be closed and therefore fixing it.
Is it free choice answer or selecting the following?