Consider the following statements:
$(a)$ $R_2SiO$ is the repeating unit of linear silicones.
$(b)$ $RSiCl_3$ on hydrolysis followed by dehydration gives linear silicones.
$(c)$ Silicones can be used as heat insulators.
$(d)$ Silica is soluble in $HF$.
The correct statement$(s)$ is/are:

  • A
    $a, b, c$ and $d$
  • B
    $a, c$ and $d$
  • C
    $a, b$ and $d$
  • D
    $a$ and $c$

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