Question

Do not cry __ spilt milk (prepositions)​

Answer 1

Do not cry over spilt milk. (In terms of a proverb)

Do not cry about spilt milk. (In terms of grammer)

NOTE : It can be both over and about. So I think only one of those word is given in options. So put what is in options either over or about. And if both are there in options then use over, it is always correct.