Unit vector I. has dimensions and a unit. II. has unit magnitude. III. when multiplied by a scal...

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Unit vector
I. has dimensions and a unit.
II. has unit magnitude.
III. when multiplied by a scalar results in a scalar.
Which of the following statement(s) is/are incorrect?
(a) Both I and II
(b) Only II
(c) Both I and III
(d) Both II and III
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