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If 0 lt theta lt phi lt 90^(@), then whi...

If `0 lt theta lt phi lt 90^(@)`, then which one of the following correct ?

A

`(sin theta + cos phi)^(2) gt 2`

B

`(sin^(2) theta + cos^(2) phi)^(2) ge 2`

C

`(sin^(2) theta + cos^(2) phi)^(2) lt 2`

D

`(sin^(2) theta + cos^(2) phi)^(2) gt 2`

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