Answer:
D. A positive cation and a negative anion
Step-by-step explanation:
An ionic compound is defined as the chemical compound formed by the combination of two charged particles or ions held together by electrostatic forces.
An ionic compound is made up of ions, a cation which is a positively charged ion and an anion which is a negatively charged ion. Example of ionic compounds are Lithium Fluoride, Lithium Iodide, and Sodium Bromide.
Hence, the correct answer is "D. A positive cation and a negative anion".