Which of the following statement is correct in relation to the halogenation of alkane ?
A. The reactivity of chlorine is less than bromine towards alkanes.
B. Photochemical chlorination of methane is formed in slowest step.
C. Free radicals are pyramidal intermediat, stabilised by hyperconjugation and resonance.
D. Bromine has much higher regioselectivity than chlorine in abstractinig `3^(@)` hydrogen.
