Safeguard available to tenants

Dear all I had a query Nowadays in most cases the landlord does only 11 months agreement with a tenant. Suppose, Mr.A takes a commercial space on rent with an usual 11 months agreement and makes a showroom say KFC, investing Rs. 1 crore on interiors etc. Now if after 11 months at the time of renewal, the landlord says to Mr.A Case1: either to doube the rental citing increase in market rate or vacant the space. OR Case2: the landlord needs the space for his personal use and so Mr.A will have to vacant the space on 3 months notice. In such cases what safeguards does a tenant has. Please explain. As I am thinking to take a commercial space on rent.