They have to buy medicine.(What question)​

⟶ They have to buy medicine. (What question)

We need to change it to a 'what' question format. The question should be framed as ⟶ What should they buy?

⟶ It's a common mistake people make as they write he question as ⟶ 'What medicine should they buy?'. This will be wrong as they haven't given the name of the medicines.

im not 100 percent sure but i think its a