In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[Q]: Pelycosaurs are a paraphyletic group of _ primitive families of synapsids.
[A]: six

[Q]: Carbon comes in _ kinds- dust, coconut shell or granulated.
[A]: three

[Q]: Fungi combine the advantages of the _ reproductive modes.
[A]:
two