Question

of the six kingdoms now recognized in the modern classification system
four are eukaryotic and two are prokaryotic.
all six kingdoms are eukaryotic.
all six kingdoms are prokaryotic.
two are eukaryotic and four are prokaryotic.

Explanation:

In the modern classification system, the six kingdoms are Animalia, Plantae, Fungi, Protista (all eukaryotic), Bacteria, and Archaea (both prokaryotic). So four are eukaryotic and two are prokaryotic.

Answer:

four are eukaryotic and two are prokaryotic.