The sentence says that eating that particularly cooked meat can be harmful to health. Thus, it can be concluded that the meat is not cooked properly. Thus, the answer along with 'cooked' must be close in meaning to 'improperly cooked'.
Option A is correct. 'Under cooked' means 'not cooked completely'. It is close in meaning to 'improperly cooked'. Thus, it is correct.
Option B is incorrect. 'Non cooked' is grammatically incorrect. Thus, it does not fit in the blank.
Option C is incorrect. There is no phrase such as 'anti cooked'. Thus, it cannot be the answer.
Option D is incorrect. 'Il cooked' is not a correct phrase either. Thus, it is incorrect.