In the case of Royal British Bank v Turquand:
a) The court ruled in favor of the Royal British Bank, establishing the principle of constructive notice.
b) The court ruled in favor of Turquand, establishing the principle of estoppel.
c) The court ruled that Turquand was personally liable for the bank's debts.
d) The court established the principle of indoor management, protecting third parties dealing with a company in good faith.