The sums of \[n\] terms of three A.P.'s whose first term is 1 and comm – McqOptions

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1.	The sums of \[n\] terms of three A.P.'s whose first term is 1 and common differences are 1, 2, 3 are \[{{S}_{1}},\ {{S}_{2}},\ {{S}_{3}}\] respectively. The true relation is
A.	\[{{S}_{1}}+{{S}_{3}}={{S}_{2}}\]
B.	\[{{S}_{1}}+{{S}_{3}}=2{{S}_{2}}\]
C.	\[{{S}_{1}}+{{S}_{2}}=2{{S}_{3}}\]
D.	\[{{S}_{1}}+{{S}_{2}}={{S}_{3}}\]
Answer» C. \[{{S}_{1}}+{{S}_{2}}=2{{S}_{3}}\]

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