What is the core of the moon made of?

What is the core of the moon made of?
– Titanium
– Copper
– Iron
– Granite

Many consider the composition of the moon a mystery because scientists can only guess at the internal composition of Earth’s only natural satellite. The lunar core is the innermost layer and only accounts for about 20 percent of the moon’s diameter. According to most scientists, the lunar core is metallic iron. There may be small amounts of sulfur and nickel included, and most astronomers think at least part of the moon’s core is molten. Source: UniverseToday.com

Iron

Iron is a chemical element with symbol Fe and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Wikipedia
Symbol: Fe
Atomic mass: 55.845 u ± 0.002 u
Atomic number: 26
Melting point: 1,538 °C
Electron configuration: [Ar] 3d64s2
Boiling point: 2,862 °C