100 POINTS!!!
Suppose a program requires a password that is a combination of numbers and letters but is not key sensitive. However, the user input is received as a string with letters that can have arbitrary cases. What code can be used to validate user input, u_pass, against the actual password, a_pass?

u_pass.upper() == str(a_pass).upper()
u_pass == a_pass
u_pass == str(a_pass)
u_pass is a_pass