Arrange the following in the ascending order of wavelength: A. Gamma rays $\left(\lambda_1\right)$ B. $x$ - rays $\left(\lambda_2\right)$ C. Infrared waves $\left(\lambda_3\right)$ D. Microwaves $\left(\lambda_4\right)$ Choose the most appropriate answer from the options given below

• A

  $\lambda_4 < \lambda_3 < \lambda_1 < \lambda_2$
• B

  $\lambda_2 < \lambda_1 < \lambda_4 < \lambda_3$
• Correct answer
  C

  $\lambda_1 < \lambda_2 < \lambda_3 < \lambda_4$
• D

  $\lambda_4 < \lambda_3 < \lambda_2 < \lambda_1$

Hence, the correct answer is option: 'C'.