Rental Agreement

Usually rental agreements are made for 11 months although there is no rule that you cannot go beyond 11 months but if you do that it'll cost you more like stamp duty charges etc along with that you'd have to go for a must registration process. That's why most people prefer 11 month period rather than 12 months or more. 

Kindly refer to the below mentioned links:

https://www.nobroker.in/forum/can-we-extend-residential-rental-agreement-beyond-3yrs/https://www.google.com/amp/s/m.timesofindia.com/business/faqs/documents/why-rent-agreements-are-prepared-for-11-months/amp_articleshow/72451490.cms

https://www.google.com/amp/s/www.livemint.com/Money/Ddu4LdTyMEjiNOvm3Lf2oL/Why-rent-agreements-are-usually-of-11-months-only.html%3ffacet=amp

The proper name is "Leave & License" Agreement.  The laws governing this agreement differ from state to state. 

Yes, any suggestion depends upon the law in force in your State.