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If a1,a2,a3,………….a12 are in A.P. and /\1...

If `a_1,a_2,a_3,………….a_12` are in A.P. and `/_\_1 =|(a_1a_5, a_1,a_2),(a_2a_6,a_2,a_3),(a_3a_7,a_3,a_4)|, |(a_2a_10, a_2,a_3),(a_3a_11,a_3,a_4),(a_4_12,a_4,a_5)| then /_\_1:/_\_2=`
`(A) 1:2`
`(B) 2:1`
`(C) 1:1`
`(D)` none of these

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