I understand that people use Games Howell, Tukey or sometimes pair-wise t-test (with correction) test as post hoc analysis procedures following one-way ANOVA.
My question is following. For example, I have four groups, A, B, C and D. I did a ANOVA and found a significant p-value. If I only care about A vs B, A vs C and C vs D, what post hoc analysis procedure do I need to use?
Thanks in advance.