A red solution strongly absorbs light at which wavelength range?

A red solution appears red because it absorbs light in the blue to green wavelength range. Colors are perceived based on the wavelengths of light that are not absorbed by the solution; instead, those wavelengths are reflected or transmitted.

When considering the color red, it corresponds to an absorption of light in the 400-500 nm range, which typically includes the blue and green regions of the spectrum. Therefore, a solution that strongly absorbs light in this wavelength range will reflect red light, making it appear red to the observer.

The other options represent wavelength ranges that correspond to colors closer to the green and blue parts of the spectrum. These colors would not absorb red light effectively and, as such, would not produce a red appearance.