Let a1,a2,……,an be a given A.P. whose common difference is an integer and Sn=a1+a2+………..+an.If a1=1,an=300 and 15≤n≤50
, then the orderedpair (Sn−4'an−4) is equal to:
A (2490, 248)
B (2480, 248)
C (2480, 249)
D (2490, 249)