Louis Marmet, in a paper titled: “On the Interpretation of Red-Shifts: A quantitative comparison of red-shift mechanisms-II” Dated 4th December 2014, [1] has briefly compiled around 59 candidate mechanisms, including the standard Big Bang Cosmology, attempting to explain the observation of the ‘cosmological red-shift’. This paper proposes some criteria for short-listing the most likely explanations; and adds some more explanations to the list. The need for considering alternative mechanisms arises because the Big Bang cosmology is based on the assumption of homogeneity and isotropy of space at 100 M pc scale, for the explanation of the ‘cosmological red-shift’, whereas linear Hubble law is observed even at 1 M pc distances, where distribution of matter and energy is clearly not homogeneous. And Big Bang Cosmology demands 95 % ‘dark-energy’ which is not yet found. Alternative explanations for ‘cosmological red-shift’ are rejected under a pre-text that they are not compatible with the observation of ‘time-dilation of super novae light-curves’; but a paper by Tank, titled “Wave-theoretical insight into the Relativistic Length-contraction and Time-dilation of Super novae Light-curves” [2] has shown that any mechanism which can cause ‘cosmological red-shift’ will also cause ‘time-dilation of super novae light-curves’, so every possible mechanism needs to be considered without any bias. The criteria for short-listing proposed here is: that the loss in energy of cosmologically red-shifting photon is proportional to the strength-ratio of gravitational and electric forces ( G me mp / e^2), which suggests that the energy of inter-galactic photon seems to get branched-out into gravitational and electrostatic potential-energy parts, and gravitational potential-energy-part is getting subtracted from the energy of the photons.