Concept: The question tests on basic Coordinate Geometry
Solution:
For 2 perpendicular lines, the product of their slopes m1 * m2 = -1
2y = 4x - 6
So, y = 2x - 3
m1 = 2
2 * m2 = -1
m2 = -1/2
This line has a y intercept of 3. Putting this in the equation y = mx + c, where m is the slope and c is the y intercept, we get y = (-1/2) * x + 3
2y = -x + 6
Therefore 2y + x = 6
Option E