If $\overrightarrow a$ and $\overrightarrow b$ are two collinear vectors, then which of the following are incorrect:

Question

$$\begin{array}{l} (A) \quad \overrightarrow b = λ \overrightarrow a, \text{ for some scalar } λ \\(B) \quad \overrightarrow a = ± \overrightarrow b \\(C) \quad \text{the respective components of}\; \overrightarrow a\; and\; \overrightarrow b \text{ are not proportional} \\ (D) \quad \text{ both the vectors } \overrightarrow a\; and\; \overrightarrow b \text{ have same direction, but different magnitudes.} \end{array}$$