A.  (x2/a2+y2/b2)2=d2  (x2/a4+y2/b4)

B.  (x2/a2+y2/b2)2= (x2/a4+y2/b4)

C.  (x2/a2+y2/b2)2=2d2 (x2/a4+y2/b4)

D.  (x2/a2+y2/b2)2=d2 (x2/a4-y2/b4)

Correct Answer :
(x2/a2+y2/b2)2=d2  (x2/a4+y2/b4)
Explanation :
No Explanation available for this question
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