A blue T-shaped block has an orange arrow on its stem pointing up-left and a dot near its right end. The mirror is on the LEFT. Which panel shows the image?

The T is symmetric, so follow the arrow and the dot: the arrow now points up-RIGHT and the dot sits near the LEFT end of the bar: (b). (a) moves the dot but leaves the arrow pointing up-left, (d) turns the T upside down and (c) does both.