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In Delta ABC , if c^(4) - 2 (a^(2) + ...

In `Delta ABC , if c^(4) - 2 (a^(2) + b^(2) ) c^(2) + a^(4) +a^(2) b^(2) + b^(4) = 0 `

A

` 30 ^(@) `

B

` 45 ^(@) `

C

` 60 ^(@) `

D

` 75 ^(@) `

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The correct Answer is:
C
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