Which of the following is incorrect regarding the rules of nomenclature?

• A
  Biological names are generally in Latin and written in italics.
• B
  The first component in a biological name represents the genus,while the second component denotes the species.
• C
  When both components of a biological name are handwritten,each word is separately underlined.
• D
  The first letter of the species name is written in capital letters,and the genus name is written in small letters.