I have given a field in my backend as selection but while I am choosing my field for the frontend it appears to be a radio button. I need a reason why it's changing and how it can be resolved?

from odoo import models, fields

class Alumni_Form_Record(models.Model):

_name="res.partner"

_inherit='res.partner'

exam=fields.Selection([('icse','ICSE'),('isc', 'ISC')], string="Examination")

yop=fields.Integer(string="Year Of Passing ICSE/ ISC")

my_teachers=fields.Char(string="My Teachers")

qual=fields.Selection([('med','Medical Field'),('it','IT Professional'),('engg','Engineer'),('bs','Banking Sector'),('law','Law'),('edu','Education'),('res','Research'),('oth','Others')], string="Qualification/ Profession Category")

hqh=fields.Char(string="Highest Qualification Held")

som=fields.Char(string="Specialization or Major")

ysk=fields.Char(string="Your Special Skill(In any area of interest)")

clg=fields.Char(string="Institute/ College/ University")

ped=fields.Selection([('job','Job'),('se','Self Employed'),('bus','Business'),('stud','Student'),('hm','House Maker'),('ot','Others')],string="Present Employment Status")

about=fields.Text(string="About Me")

Here in this model.py, you could see qual as selection but in the frontend it appears to be a radio button. The frontend I mean here in the theme using form builder (here, it is create a customer form).