hat is the correct order of electronegativity?M1−<M2−<M3−<M4−M1−>M2−>M3−>M4−M1−<M2−<M3−<M4−M4−<M2−<M3−<M1−

Your question seems to be incomplete or not clear. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7.

If M1, M2, M3, and M4 are different elements, their order in terms of electronegativity would depend on what elements they represent. However, you haven't specified what these elements are.

If you're asking about the trend in electronegativity in the periodic table, it increases from left to right across a period, and decreases down a group. So for example, in the second period, lithium (Li) is less electronegative than beryllium (Be), which is less electronegative than boron (B), and so on, until you reach fluorine (F), the most electronegative element.

Please provide more details or clarify your question so I can give a more accurate answer.