Which one among the following has the highest energy ?

Photon energy is given by Planck’s relation E = hc/λ, so energy is inversely proportional to wavelength and directly proportional to frequency [1]. In the visible spectrum the wavelengths increase from violet/blue through green and yellow to red; typical ranges place blue around 450 nm, green around 495–570 nm, yellow around 570–590 nm, and red beyond ~620 nm [2]. Because blue light has the shortest wavelength (highest frequency) among the four choices, each blue photon carries more energy than green, yellow, or red photons. Therefore, blue light has the highest photon energy of the listed options [2].

Sources

1. [1] https://sathee.iitk.ac.in/article/physics/physics-photon-energy/
2. [2] https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/light-spectrum