27. Except as otherwise provided by this Chapter, specific performance of a contract may be enforced against-(a) either party thereto;(b) any other person claiming under him by a title arising subsequently to the contract, except a transferee for value who has paid his money in good faith and without notice of the original contract;(c) any person claiming under a title which, though prior to the contract and known to the plaintiff, might have been displaced by the defendant;(d) when a public company has entered into a contract and subsequently becomes amalgamated with another public company, the new company which arises out of the amalgamation;(e) when the promoters of a public company have, before its incorporation, entered into a contract, the company: provided that the company has ratified and adopted the contract and the contract is warranted by the terms of the incorporation.Illustrationsto clause (b)- A contracts to convey certain land to B by a particular day. A dies intestate before that day without having conveyed the land. B may compel A's heir or other representative in interest to perform the contract specifically. A contracts to sell certain land to B for taka 5,000. A afterwards conveys the land for taka 6,000 to C, who has notice of the original contract. B may enforce specific performance of the contract as against C. A contracts to sell land to B for taka 5000. B takes possession of the land. Afterwards A sells it to C for taka 6,000. C makes no inquiry of B relating to his interest in the land. B's possession is sufficient to affect C with notice of his interest, and he may enforce specific performance of the contract against C. A contracts, in consideration of taka 1,000 to bequeath certain of his lands to B. Immediately after the contract A dies intestate, and C takes out administration to his estate. B may enforce specific performance of the contract against C. A contracts to sell certain land to B. Before the completion of the contract, A becomes a lunatic and C is appointed his committee. B may specifically enforce the contract against C.to clause (c)- A, the tenant for life of an estate, with remainder to B, in due exercise of a power conferred by the settlement under which he is tenant for life, contracts to sell the estate to C, who has notice of the settlement. Before the sale is completed, A dies. C may enforce specific performance of the contract against B. A and B are joint tenants of land, his undivided moiety of which either may alien in his life time, but which, subject to that right, devolves on the survivor. A contracts to sell his moiety to C and dies. C may enforce specific performance of the contract against B.