Answer
Omega-3 fatty acid
Explanation:
The monomers are small units or molecules which join with each other end in a huge to end and give rise to the polymers.
DNA and albumin:
If we talk about albumin it is a protein which is present in eggs. All proteins are made up of monomers of amino acids. Similarly, DNA is also a polymer because it is made up hundreds and thousands of small monomeric units called nucleotides.
glycogen:
It is also a biological polymer where several monomer units of glucose are joined together through alpha acetal linkages.
Omega-3 fatty acid:
It is not a polymer. Its a group of fatty acids that contain a double bond at carbon of 3rd position from one end of the carbon chain that was initiated from methyl group and contains one carboxyl group located at the other molecular end. For example: Alpha-Linelenic acid.
Therefore, Omega-3 fatty acid is the right option.
Hope it helps!