Q.

D-(+)-Glyceraldehydeii)H2O/H+iii)HNO3i) HCN

The products formed in the above reaction are        [2023]

1 One optically active and one meso product  
2 One optically inactive and one meso product  
3 Two optically active products  
4 Two optically inactive products  

Ans.

(1)