Need help with this

A sequence of transformations is performed on a figure. Select all the sequences of transformations that would result in a congruent figure.

1. a translation, then a reflection
2. a rotation, then a dilation
3. a rotation, then a reflection
4, a rotation, then a rotation
5. a dilation, then a reflection
6. a rotation, then a translation

i think that it is 3 + 4