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a1, a2, a3 …..a9 are in GP where a1 lt 0...

`a_1, a_2, a_3 …..a_9` are in GP where `a_1 lt 0, a_1 + a_2 = 4, a_3 + a_4 = 16`, if `sum_(i=1)^9 a_i = 4 lambda`then `lambda` is equal to

A

171

B

`-513`

C

`511/3`

D

`-171`

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The correct Answer is:
D
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