Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_41 ( fuel_propulsion VARCHAR, year VARCHAR, numbers__quantity_ordered_ VARCHAR )

### Question ###
For the year 1975, what is Propulsion, with a Number (quantity ordered) of 4756-4788 (33 buses)?

### Accurate SQL ###

SELECT fuel_propulsion FROM table_name_41 WHERE year = 1975 AND numbers__quantity_ordered_ = "4756-4788 (33 buses)"