Answer:
Option-D [(CH₃CH₂CH₂)₂CH] is the correct answer.
Step-by-step explanation:
In chemistry Cracking the process by which a long chain of hydrocarbons are broken down into small molecules or light hydrocarbons.
In given example Nonane is a compound which consists of Nine carbon atom chain. So, on cracking it can produce small organic molecules with carbon atoms less than nine.
While option-D is for 4-propylheptane which is made up of 10 carbon atoms. Therefore, Nonane on cracking can not produce a hydrocarbon with greater number of carbon atoms.