The question asks what one-sided agreements are called under the Consumer Protection Act, 2019. This can be answered by testing each option against its actual legal meaning and checking whether that meaning matches a heavily one-sided agreement.
Testing each label against what a one-sided agreement actually means eliminates the first three options, since none of them describe the fairness of contractual terms. Only unconscionable contracts captures agreements that are unreasonably weighted in favour of one party.
So the correct answer is unconscionable contracts.