In the Goldschmidt aluminothermic process,thermite contains:

• A
  $3$ parts of $Al_2O_3$ and $4$ parts of $Al$
• B
  $3$ parts of $Fe_2O_3$ and $2$ parts of $Al$
• C
  $3$ parts of $Fe_2O_3$ and $1$ part of $Al$
• D
  $1$ part of $Fe_2O_3$ and $1$ part of $Al$