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# In the presence of peroxide,hydrogen chloride and hydrogen iodide do not give anti-Markownikoff addition to alkenes because

$\begin{array}{1 1}(a)\;\text{Both are highly ionic}\\(b)\; \text{One is oxidising and the other is reducing}\\(c)\;\text{One of the steps is endothermic in both the cases}\\(d)\;\text{All the steps are exothermic in both the cases}\end{array}$

Because one of the steps is endothermic in both cases.
Step I:
Step II:
For HCl step I(b) is endothermic and step II is exothermic.
For HI step I(b) is exothermic and step II is endothermic.
Hence (c) is the correct option.