The digit in unit's place of the number (1570)2 + (1571)2 + (1572)2 + (1573)2 is :

Answer: Option A

	(1570)2	+	(1571)2	+	(1572)2	+	(1573)2
unit digit →	↓		↓		↓		↓
	02	+	12	+	22	+	32
	↓		↓		↓		↓
	0	+	1	+	4	+	9 = 14

unit digit = 4