The correct option is C Monograph
Monographs contain complete information on any one taxon. Hence, they give a comprehensive account of a genus or family at a particular time. Hence, the correct answer is option c.
Herbarium is a store house of collected plant specimens that are dried, pressed and preserved on sheets. Herbaria serve as referrences for taxonomic studies.
Flora provides a list of the plant species found in an area and the information about the habitat and distribution of plants in that area.