If k is the largest possible real number such that p4 + q4 = (p2 + kpq + q2)(p2 kpq + q2), then the value of k is

If k is the largest possible real number such that p4 + q4 = (p2 + kpq

1.	If k is the largest possible real number such that p4 + q4 = (p2 + kpq + q2)(p2 kpq + q2), then the value of k is
A.	1
B.
C.	2
D.
Answer» E.