Step 1: Concept
Volatile oils (essential oils) are odorous principles found in various plant parts that evaporate at room temperature.
Step 2: Meaning
Plants like Coriander (fruit), Fennel (fruit), and Clove (flower bud) are rich in volatile oils extracted by distillation.
Step 3: Analysis
Benzoin is a balsamic resin obtained from the bark of Styrax species. It contains balsamic acids (benzoic/cinnamic) and resins, but it is not a source of volatile oil.
Step 4: Conclusion
Thus, Benzoin is the crude drug among the choices that does not contain volatile oil.
Final Answer: (D)