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_41398 ( "Player" text, "Club" text, "League" real, "FA Cup" real, "FA Trophy" real, "League Cup" real, "Total" real )

### Question ###
Which League Cup has a FA Cup of 5, and a Club of boston united, and a League smaller than 16?

### Accurate SQL ###

SELECT MAX("League Cup") FROM table_41398 WHERE "FA Cup" = '5' AND "Club" = 'boston united' AND "League" < '16'