The optimum row to row and plant to plant spacing for early cabbage is (RJ AAO 2015)

✅Explanation: Early cabbage varieties generally have smaller heads and a shorter growing season compared to late varieties. The spacing of 45 cm x 45 cm provides adequate space for early cabbage plants to develop properly without overcrowding. This spacing allows for sufficient sunlight penetration, air circulation, and nutrient uptake, leading to healthy growth and good head formation.