Binomial nomenclature consists of two words or parts
The first part is the name of genus followed by the second part which is the name of the species.
These names are always in Latin.
The name of the genus begins with a capital letter (upper case) while the species begins with a small letter (lower case).
Both genus and species are separated by a single space.
The names are underlined when handwritten or in italics when typed or printed
For e.g. Mangifera indica (mango), Fasciola hepatica (liverfluke), etc.
So, the correct answer is option B.