A. Boluchistan: Ephedra nebrodensis, Juniperis excelsa, Ferula foetida, Glycyrrhiza glabra
B. Sindh: Cassia angustifolia, Ricinus communis, Commiphora mukul, Citrulus colocynthis
C. Punjab: Cannabis sativa, Fumaria indica, Cassia fistula, dhatoda vesica, Datura alba
D. KPK: Artimestia maritime, Hyoscyamus niger, Dioscorea deltoidea, Valeriana wallichii
E. All of the above
The correct answer to the question: "Important medicinal plants occurring in different provinces of Pakistan are:" is "All of the above".