Aldose

Q. Which two of the following compounds are reduced to the same chiral alditol by sodium borohydride?

1. II and III
2. I and II
3. III and IV
4. II and IV

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

1. L-erythrose, L-threose, D-erythrose, D-threose
2. D-erythrose, D-threose, L-erythrose, L-threose
3. L-erythrose, L-threose, L-erythrose, D-threose
4. D-threose, D-erythrose, L-threose, L-erythrose

Q. 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