The wavelength range of X-rays is

The correct answer is Option (2) → 1 nm to $10^{-3}$ nm

X-rays are a form of electromagnetic radiation with very short wavelengths and high energy. Their wavelengths are much smaller than visible light (400–700 nm), typically in the range of 1 nm to 10^-3 nm. This short wavelength allows X-rays to penetrate materials that visible light cannot, making them useful in medical imaging and material analysis.

1 nm to 10^-3 nm