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

1. A $\lambda_1<\lambda_2<\lambda_3<\lambda_4$ Correct answer
2. B $\lambda_2<\lambda_1<\lambda_4<\lambda_3$
3. C $\lambda_4<\lambda_3<\lambda_2<\lambda_1$
4. D $\lambda_4<\lambda_3<\lambda_1<\lambda_2$