Among the Group 4A elements, only carbon has an allotrope with a diamond structure, while the rest have metallic allotropes. Is this statement true or false? If it is true, justify your answer. If otherwise, state the correct answer.

True. This is because carbon is the only nonmetal in the Group 4A elements.

True. This is because diamond structure is a characteristic of carbon allotropes only.

False. The elements C, Si, and Ge can have allotropes with a diamond structure, while Sn and Pb have metallic allotropes. 

False. The elements C and Si can have allotropes with a diamond structure, while Ge, Sn, and Pb have metallic allotropes.