Let $R$ be the relation in the set $\{1, 2, 3, 4\}$ given by $R = \{(1, 2), (2, 2), (1, 1), (4,4), (1, 3), (3, 3), (3, 2)\}.$Choose the correct answer.
→Let $f(x) = \left\{ {\begin{array}{*{20}{c}}
{\,{x^3} - {x^2} + 10x - 5\,\,,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x \le 1\,\,\,\,\,\,\,\,\,\,\,\,}\\
{ - 2x + {{\log }_2}({b^2} - 2),\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\, > 1\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}} \right.$ the set of values of $b$ for which $f(x)$ has greatest value at $x = 1$ is given by
→$a, b, c$ are three non-zero, non-coplanar vectors and $p, q, r$ are three other vectors such that $p = \frac{{b \times c}}{{a\,.\,b \times c}}$,$q = \frac{{c \times a}}{{a\,.\,b \times c}}$, $r = \frac{{a \times b}}{{a\,.\,b \times c}}$. Then $[p\,q\,r]$ equals
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