विषुव संबन्धित है –

उत्तर: (A) 21 मार्च से / 21 March — The Vernal (Spring) Equinox occurs on 21 March when day and night are equal worldwide. The Autumnal Equinox is on 23 September. 21 June is the Summer Solstice, 22 December is the Winter Solstice.