Answer :

Given equation of the parabola is 4y2 + 2x - 20y + 17 = 0



4y2 - 20y + 17 = - 2x





Comparing with standard form of parabola (y - a)2 = - 4b(x - c) we get,



We know that the that the length of the latus rectum is 4b.


The correct option is C

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