In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Question: Question linked to image # 12 What is the most reasonable attitude at this time ?: 
 Options:  <1> Remove the entire catheter and reinsert it. <2> Extract about 10 cm the catheter and install the appropriate treatment. <3> Channel another central venous line through the jugular vein. <4> Leave it as it is because it can be used to monitor central venous pressure. <5> We can not use the catheter because it has perforated the vein and it is located in the lung.
2

Question: In the activation of the serum complement, the assembly of the Membrane Attack Complex begins with: 
 Options:  <1> C9 <2> C5b. <3> C3a. <4> C6 <5> C8.
2

Question: The hydrogen atoms with partial positive charge of one water molecule can interact with the oxygen atoms, with negative partial charge of another water molecule. What name does this interaction receive? : 
 Options:  <1> Hydrophobic <2> Polar. <3> Hydrogen bridge. <4> Van der Wall. <5> Zwitterion.

3