Possible subjects for final oral exam

As I have told in the lectures recetly:

At the final exam you may choose one of the following

5 subjects for the first 10 minutex of your oral exam

1) The S-matrix expansion(Scattering operator) of 

    quantum electrodyamics (QED)

2) Abelian and non-abelian gauge invariance

3) Quantum chromodynamics (QCD)

4) Spontanous  symmetry breaking (SSB) 

   and the Higgs-mechanism

5) Electroweak interactions after the Higgs-mechanism.