Answer the following question given this paragraph: 

Most of the rocks and minerals that make up the Earth’s crust are composed of positive and negative ions held together by ionic bonding. An ionic compound is an electrically neutral compound consisting of positive and negative ions. You are very familiar with some ionic compounds such as sodium chloride (NaCl). A sodium chloride crystal consists of equal numbers of positive sodium ions (Na + ) and negative chloride ions (Cl − ).


Q: What is an electrically neutral compound with positive and negative ions?

 Choices:

- correlated compound

- isotope

- neutralized molecule

- ionic compound

A:
ionic compound
