Pick out the wrong statement.

Answer: Option C

The rate of decomposition of olefins in catalytic cracking is actually faster than in thermal cracking. This is because catalytic cracking provides a more efficient pathway with lower activation energy compared to thermal cracking. Catalysts accelerate the cracking process, leading to a higher rate of reaction for olefins.

Option A is incorrect because n-paraffins generally crack faster than iso-paraffins due to less stable intermediates.

Option B is correct as stated; catalytic cracking is indeed endothermic, requiring heat input, whereas the regeneration of the catalyst is exothermic, releasing heat.

Option D cannot be the answer since one of the previous statements is incorrect.