are two collinear vectors, then which of the following are incorrect:
(a) 
(b) 
(c) the respective components of 
are not proportional
(d) both the vectors 
have same direction, but different magnitudes.
We know that two vectors are collinear if they have the same direction or are parallel or anti-parallel. They can be expressed in the form 
where a and b are vectors and ' m ' is a scalar quantity.
Therefore, (a) is true.
In (b), 
So, (b) is also true.
The vectors 
and 
are proportional,
Therefore, (c) is not true.
The vectors 
and 
can have different magnitude as well as different direction.
Therefore, (d) is not true.
We are asked the options which are not true.
∴ The correct answer is (c) and (d).
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