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The major axis lies along the y-axis for the ellipse
Ax²/36 + y²/4 = 1
Bx²/9 + y²/49 = 1
Cx²/49 + y²/16 = 1
Dx²/25 + y²/9 = 1
Answer & Solution
Correct answer: B. x²/9 + y²/49 = 1
The major axis follows the larger denominator, and 49 is under y² only in the last equation.
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