Observe the following statements : Sta...

Observe the following statements :
Statement-I : The angle between the line `x=y=z` and the plane `x+y+z=4` is `90^(@)`. Statement-II : A tetradedron has vertices `O(0,0,0),A(1,2,1),B(2,1,3)andC(-1,1,2)`. Then the angle between the faces `OABandABC` is `cos^(-1)((19)/(35))`.

A

Only I

B

Only II

C

Both I and II

D

Neither I nor II

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The correct Answer is:

C

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