Answer:             None of the given options show polymer made up of H₂C=CH-CN (Acrylonitrile).
Explanation:                   Acrylonitrile (H₂C=CH-CN) which is a monomer on self linkage results in a large chain polymer called as 
Polyacrylonitrile.
                   The structure of Polyacrylonitrile is as follow,
                                             --(H₂C-CHCN-)n--Where n shows the number of Acrylonitrile units joined together in the formation of Polyacrylonitrile. This polymerization reaction can take place by different mechanisms including free radical mechanism, acid catalyzed addition or base catalyzed addition reaction.
The polymerization is shown below,
 
        
             
        
        
        
Answer:
The correct answer is -  A. Each organ does part of a larger job.
Explanation:
An organ in an organ system of an individual organism is the group of similar tissues that collectively perform a common function in the organ system and play their part in a larger job.
A group of organs makes an organ system to perform a particular but large function in the organism for its survival. An example of the organ in an organ system is the heart in the cardiovascular system. The heart is an organ that pumps the blood out of the heart to the various part of the cardiovascular system such as lungs, arteries, and veins so it can take nutrients and oxygen to various parts carried by the blood.
 
        
             
        
        
        
H2O2(I)
C6H6(O)
CO2(I)
C2H6(O)
HNO3(I)
        
                    
             
        
        
        
Advantages
people are there to help
never lonely 
they could do things for you
disadvantages 
loud 
annoying to you
they don't do work
        
             
        
        
        
I because it is an acid, it should be soluble in hexane