Which of the following statements is correct?

Question

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