Housing rent

this much info is not enough to compute exemption. refer HRA calculator and compute yourself giving all details using the below link:

https://www.taxspanner.com/calculators/hra-calculator/ 

The exemption in respect of HRA is based upon the following factors:
(1) Basic Salary
(2) Place of Residence
(3) Rent paid
(4) HRA received
Since there is a possibility of change in any of the above factors during the previous year, exemption for HRA
should not always be calculated on annual basis. As long as there is no change in any of the above factors it can
be calculated together for that period. Whenever there is a change in any of the above factors, it should be
separately calculated till the next change.

One can show rent of more than 1 lac but he needs to provide PAN of landlord for this.

About the HRA calculation, you can visit

https://financeandtaxhub.blogspot.in/search/label/HRA%20%28House%20Rent%20Allowance%29