Which of the following statements is correct?

$\begin{array}{1 1}Si_6Cl_{14}\text{ exists as a cyclic chlorosilane}\\\text{Pyrolysis of }SiCl_4\text{ at }1150^{\large\circ}C\text{ in the presence of Si produces members of the series }Si_nCl_{2n}^{2+}\\\text{Si-F bond is weaker bond than C-F bond}\\\text{Si-Si bond is a stronger bond than C-C bond}\end{array}$

Answer : Pyrolysis of $SiCl_4$ at $1150^{\large\circ}C$ in the presence of Si produces members of the series $Si_nCl_{2n}^{+2}$
$SiCl_4+Si\rightarrow Si_2Cl_6$+higher members of the series $5Si_2Cl_2+Si_6Cl_{14}+4SiCl_4$