For a developing economy, I've seen sources claiming that the capital-output ratio (more commonly known as ICOR) is high (e.g. here and here), while other sources claiming that it's low, like below (the answer is A):
I suppose I can come up with reasons why the ICOR or a developing country might be low: low rate of saving -> little investment on capital -> low returns -> low ICOR. Then again, the ICOR is a ratio, so even if both nominal investment and output are low, there is no guarantee that they're values are therefore low relative to each other, if anything the ICOR can easily be high, as explained in the two sources that claim the ICOR is high for such economies.