Choosing tests and normality

In which of the following situations is it acceptable to use a parametric test to compare group means, like a t-test or ANOVA?

50 XP

When looking for significant variation in any continuous variable, irrespective of the shape of the distribution.
press1
Only when the variable of interest is normally distributed.
press2
When comparing normally distributed samples or non-normally distributed samples with large sample sizes.
press3
When looking for significant variation in any discrete variable.
press4