Let $b = 3j + 4k$,$a = i + j$ and let $b_1$ and $b_2$ be component vectors of $b$ parallel and perpendicular to $a$ respectively. If $b_1 = \frac{3}{2}i + \frac{3}{2}j$,then $b_2 = $
- A$\frac{3}{2}i + \frac{3}{2}j + 4k$
- B$-\frac{3}{2}i + \frac{3}{2}j + 4k$
- C$-\frac{3}{2}i + \frac{3}{2}j$
- DNone of these
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