Veronal and luminal are derivatives of barbituric acid which are.

1.  tranquilizers

2.  non-narcotic analgesic

3.  anti-allergic drugs

4.  neurologically active drugs


 

(a, d)

Derivatives of barbituric acid viz., veronal, and luminal are called barbiturates. These barbiturates constitute an important class of tranquilizers.

Tranquilizers are a class of chemical compounds used for the treatment of stress and mild or severe mental diseases. Tranquilizers are neurologically active drugs. These drugs affect the message transfer mechanism from the nerve to the receptor.