The sum of first 45 natural numbers is?	Choose the correct option:
A) 900	B) 1000	C) 1035	D) 1040	E) 1045
et Sn =(1 + 2 + 3 + ... + 45). This is an A.P. in which a =1, d =1, n = 45.   Sn =	n	[2a + (n - 1)d]	=	45	x [2 x 1 + (45 - 1) x 1]	= 45	x 46 = (45 x 23)   2	2	2   = 45 x (20 + 3)   = 45 x 20 + 45 x 3   = 900 + 135= 
<gadget id="calculator">900 + 135</gadget>
<output>1_035</output>
1035.   Shorcut Method:   Sn=	n(n + 1)	=	45(45 + 1)	= 1035.   2	2   1035)
<result>C</result>
The sum of first 45 natural numbers is?