14. The inner transition metals are made up two series known as:

a. actinide and alkaline

c. lanthanide and actinide

b. actinide and haftinide

d. lanthanide and alkaline

lanthanide and actinide

Explanation:

An inner transition metal (ITM) of chemical elements on the periodic table. They are normally shown in two rows below all the other elements. They include elements 57-71, or lanthanides, and 89-103, or actinides.