Step 1: Concept
Fruits belonging to the family Umbelliferae (Apiaceae), such as fennel, coriander, and caraway, contain volatile oils.
Step 2: Meaning
A carminative is a substance that prevents the formation of gas in the gastrointestinal tract or facilitates its expulsion.
Step 3: Analysis
The volatile oils (like anethole or carvone) present in these fruits act on the digestive system to relieve flatulence and griping pain.
Step 4: Conclusion
Most umbelliferous fruits used in pharmacy are primarily valued for their carminative and aromatic properties.
Final Answer: (B)