The correct corresponding order of names of four aldoses with configuration given below respectively, is

The correct corresponding order of names of four aldoses with configuration given below respectively, is
  1. L-erythrose, L-threose, L-erythrose, D-threose.
  2. D-threose, D-erythrose, L-threose, L-erythrose.
  3. L-erythrose, L-threose, D-erythrose, D-threose.
  4. D-erythrose, D-threose, L-erythrose, L-threose.

Solution

If the alcoholic group is present on the left side of the last chiral carbon then it is D- sugar and if it is on the left side then it is L- sugar.

All the four given molecules with their names are given below. 

Asked in: NEET 2016 (Phase 2)

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