Imagine you are a world-famous scientist attempting to label chromosomes in order to study the detailed mechanics of recombination during meiosis I. In order to achieve the maximal possible resolving power, you would want to use a fluorophore with an excitation wavelength of:

1. 719 nm (red)
2. 602 nm (yellowish-orange)
3. 532 nm (green)
4. 1 mm (infrared)