b
(b) \(\mathop {C{H_3}}\limits_{5\,\,\,\,\,\,} - \mathop {\mathop {\mathop {CH}\limits^{|\,\,\,\,\,\,\,} }\limits^{OH} }\limits_{4\,\,\,\,\,} - \mathop {C{H_2}}\limits_{3\,\,\,\,\,\,\,} - \mathop {\mathop {\mathop {\mathop {C - }\limits_{2|\,\,\,\,\,\,\,\,} }\limits_{1C{H_3}} }\limits^{|\,\,\,\,\,\,} }\limits^{C{H_3}} OH\)
\(2-\) methyl -\(2, 4 -\) pentane diol