The correct answer is (c) Void.
A lease is a contract between a landlord and a tenant that gives the tenant the right to occupy a property for a specified period of time in exchange for rent. A lease is considered void if it is not supported by consideration, if it is illegal, or if it is impossible to perform.
In this case, the lease is void because the condition that B shall walk a hundred miles in an hour is impossible to perform. It is physically impossible for a human being to walk a hundred miles in an hour. Therefore, the lease is void and neither party is bound by its terms.
(a) Valid: A valid lease is one that is supported by consideration, is not illegal, and is possible to perform. In this case, the lease is not valid because the condition that B shall walk a hundred miles in an hour is impossible to perform. Therefore, the lease is void.
(b) Voidable: A voidable lease is one that is valid but can be cancelled by one of the parties. In this case, the lease is not voidable because there is no basis for B to cancel the lease. Therefore, the lease is void.
(d) None of these: The lease is void, not none of these.