If x ≠ 0, y ≠ 0 and z ≠ 0 and1 + 1 + 1 +

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If x ≠ 0, y ≠ 0 and z ≠ 0 and 1 + 1 + 1 + 1 + 1 + 1 + 1 ,
x² y² z² 16 xy yz zx
then the relation among x, y, z is

Check through options.
If x = y = z, then

1	+	1	+	1	=	3
x²	+	y²	+	z²	=	x²

and

1	+	1	+	1
xy	+	yz	+	zx

=	1	+	1	+	1	=	3
	x²		x²		x²		x²

If x ≠ 0, y ≠ 0 and z ≠ 0 and	1	+	1	+	1	+	1	+	1	+	1	+	1	,
	x²		y²		z²		16		xy		yz		zx