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The equation of second degree x^2+2sqrt2...

The equation of second degree `x^2+2sqrt2x+2y^2+4x+4sqrt2y+1=0` represents a pair of straight lines.The distance between them is a. 4 b. `4/sqrt3` c. 2 d. `2sqrt3`

A

4

B

`4//sqrt(3)`

C

`2`

D

`2sqrt(3)`

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The correct Answer is:
C
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