The correct answer is: B. pre-incorporation contracts.
A pre-incorporation contract is a contract entered into by promoters on behalf of a company that is not yet incorporated. The promoters are personally liable for the debts and obligations of the company under a pre-incorporation contract.
A post-incorporation contract is a contract entered into by a company after it has been incorporated. The company is liable for the debts and obligations under a post-incorporation contract.
A provisional contract is a contract that is not yet binding on the parties. It is a contract that is made subject to certain conditions being met. If the conditions are not met, the contract is not binding.
In conclusion, the contracts, entered into by promoters on behalf of a prospectus company are known as pre-incorporation contracts.