The two extinct lines of the gymnosperms which are regarded as an ancestral stock from which the modern gymnosperms might have originated are?
Cordaitales and Bennettitales
Cycadales and Coniferales
Ginkgoales and Cycadales
Gnetales and Coniferales
A
Cycadales and Coniferales
B
Cordaitales and Bennettitales
C
Ginkgoales and Cycadales
D
Gnetales and Coniferales
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