Under Para III of the lease deed, it was agreed between the parties, inter alia: (a) that in case of any default in the payment of rent or any breach of the covenant between the parties, the lessor could "re enter upon the demised plot and buildings PG NO 760 or upon any part thereof in the name of the whole" and determine the lease ; (b) that, in case the lessee fulfilled his obligations under the lease and gave six months ' prior notice of his desire to obtain a renewal of the lease, the lessors shall grant a renewal lease of the demised plot and building for a further period of 21 years ; (c) if during the subsistence of this lease, the lessors get an offer (for) the purchase of the demised plot of land or the buildings or both from third parties at a valuation acceptable to the lessors they shall intimate such offers to the lessees and give them the option of buying the demised plot and buildings at such valuation and if within two weeks of receipts of such intimation to the lessees they do not send a reply to the lessors expressing their consent to buy at such valuation and do not further pay to the lessors a deposit or earnest money towards the intended purchase, the lessors shall be entitled to sell the demised plot of land or buildings to such third parties for the price for which it was offered to the said lessees and any such sale to third parties shall be only subject to this lease.