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from tkinter import *
from tkinter import ttk
top = Tk()
top.geometry("200x150")
frame = Frame(top)
frame.pack()
langs = ["C", "C++", "Java", "Python", "PHP"]
Combo = ttk.Combobox(frame, values = langs)
Combo.set("Pick an Option")
Combo.pack(padx = 5, pady = 5)
top.mainloop()