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Let ` vec a= vec i- vec k , vec b=x vec i+ vec j+(1-x) vec k` and ` vec c=y vec i+x vec j+(1+x-y) vec k` . Then `[ vec a vec b vec c]` depends on only `x` (b) only `y` Neither `xnory` (d) both `xa n dy`

A

both x and y

B

neither on x nor on y

C

only y

D

only x

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The correct Answer is:
B
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