I think it’s E (microtubules) i can be wrong but hopefully this helped
he outer core of the Earth is a liquid layer about 2,260 kilometers thick. It is made of iron and nickel. This is above the Earth's solid inner core and below the mantle. Its outer boundary is 2,890 km (1,800 mi) beneath the Earth's surface.
The base sequence in the DNA is A=T
G=C