Charcoal is -
Amorphous carbon
Explanation for correct option-B:
Explanation for incorrect option-A:
Charcoal is not crystalline because is random arrangement and short range order of atoms in charcoal.
Explanation for incorrect option-C:
Charcoal is only amorphous not can be both( crystalline as well as amorphous).
Explanation for incorrect option D:
Charcoal is amorphous as explained above.
Concluding statement: Charcoal is amorphous not crystalline in nature.