Question
Natural system of classification was developed by
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| List $- I$ | List $- II$ |
| $(a)$ Protein | $(i)$ $C = C$ double bonds |
| $(b)$ Unsaturated fatty acid | $(ii)$ Phosphodiester bonds |
| $(c)$ Nucleic acid | $(iii)$ Glycosidic bonds |
| $(d)$ Polysaccharide | $(iv)$ Peptide bonds |
Choose the correct answer from the options given below.
$(a)- (b) -(c)- (d)$