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Statement-I: If |vec(a).vec(b)|= |vec(a)...

Statement-I: If `|vec(a).vec(b)|= |vec(a) xx vec(b)|` then `(vec(a), vec(b))= (pi)/(4) or (3pi)/(4)`
Statement-II: If `vec(a).vec(b)= |vec(a) xx vec(b)|` then `(vec(a), vec(b))= (pi)/(4) or (3pi)/(4)`
Which of the above two statements are true?

A

only I

B

only II

C

both I and II

D

neither I nor II

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The correct Answer is:
A
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