The input contains 4 blocks in 2 stacks. From left to right:
- Stack 1 has 1 level. Level 1 has a green block.
- Stack 2 has 3 level. From bottom to top: level 1 has an red block, level 2 has an orange block, level 3 has an blue block,
As such, for the question "What is the spatial relation betweeen the red block and the green block?",since the red block and the green block are at different stacks, the correct answer is "<Output> C".
<Output> C