Which of the following statements is correct in relation to the halogenation of alkane ?

Bromine has much higher regioselectivity than chlorine in abstracting 3° hydrogen.

The reactivity of chlorine is less than bromine towards alkanes.

Free radicals are pyramidal intermediate, stabilised by hyperconjugation and resonance.

For photochemical chlorination of methane, $\stackrel{\bullet }{\mathrm{C}}\mathrm{l}$ is formed in slowest step.