sql light in android

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Android

hello i have this code i want to retrive a vaule from field in table and store it into string to print it but it gives me exception can anyone help me plz?
i want to retrive the value in field related_Question..

       String sqlqueries="select related_Question from relatedQuestion where word= 'بدي'";


        String r=db.fitshData(sqlqueries);

public String fitshData(String sql){
     SQLiteDatabase db = this.getReadableDatabase();
   //  db.execSQL(sql);
     Cursor cursor = db.rawQuery(sql, null);
     int col1 =cursor.getColumnIndex("related_Question");
     String value = cursor.getString(col1);
     Log.v("message","vlaue:"+value+"");
     cursor.close();

     return value;
 }