Below is my html for a dropdown control:

I want to verify that drop down has following items: ["5","15","30","45"]
I have written following piece of code:
value=["5","15","30","45"]
cy.get(seelctor).invoke('val').should('deep.equal', value)
I do not want to select all of these items just want to verify that drop down has them. Also, My html does not has the value attribute. How do i assert based on text ??