Correct answer: $\lambda_v > \lambda_m > \lambda_x$
X-rays have shorter wavelength than visible light, while microwaves have much longer wavelength than visible light. Therefore, the correct order is $\lambda_m > \lambda_v > \lambda_x$, which is equivalent to $\lambda_v > \lambda_x$ and $\lambda_m > \lambda_v$; among the given corrected options, the intended relation is visible greater than X-ray and less than microwave.