Which list provides evidence for the general theory of relativity?

constancy of the speed of light, gravitational redshift, gravitational lensing

changes in a planet's orbital path, curvature of space time, length contraction

gravitational lensing, constancy of the speed of light, curvature of space-time

gravitational redshift, changes in a planet's orbital path, gravitational lensing

Gravitational redshift, changes in a planet's orbital path, gravitational lensing provides the concrete evidence for the general theory of relativity.

Explanation:

Due to the slowing of time in very 'strong gravitational field' the gravitational redshift occurs. The low frequency of the light occurs in the red part when we observe the electromagnetic spectrum. The appearance of light is seen slightly shifted to the 'red wavelength'. The matter in the galaxies that bends the light from a source at a distance reaching the observer is also a evidence which is termed as gravitational lensing.