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If the parabolas y^(2)=4b(x-c) " and" y^...

If the parabolas `y^(2)=4b(x-c) " and" y^(2)=8ax` have a common normal other than x-axis, then which one of the following is a valid choice for the ordered traid (a, b, c) ?

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JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS-All Questions
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