Respuesta :
The statement that is a negation of the statement "all students like math" is " All students do not like math." Option A is correct.
The second sentence is wrong because there are two negations in the sentence which is not grammatically correct in English. The third and four sentences are not negations, on the contrary, they are sentences written in the affirmative form.
Negation is the process that turns an affirmative statement into its opposite denial.