Which one of the following agreements is induced by undue influence?

A applies to a banker for loan at a time when there is stringency in the money market. The banker declines to make the loan except at an unusually high rate of interest. A accepts the loan on these terms

A, at the age of sixty-five years, executes a deed of gift in favour of his only grandson gifting him all his properties to the exclusion of his wife, sons and daughters

B, a rich man, donates all his properties to a charitable trust leaving nothing for himself and his family members