Find odd one out w.r.t. taxonomic categories.
Assertion [A]: Taxonomic hierarchy includes eight obligate categories.
Reason [R]: Intermediate categories are used to make taxonomic positions more informative as it is independent of any taxon.
Find out the correct sequence of taxonomical categories of the following terms.
(a) Petunia
(b) Polemoniales
(c) Dicotyledonae
(d) Solanaceae