HRA exemption over Gratuity payment and income from other source

Esteemed members,

Request you to please reply the following query.

1. Mr. A have resigned April 2020 and received Gratuity there after only. 
2. Mr. A did not have any salaried income in F.y. 2020-21 after April.
3. Mr. A has some income from other sources with freelance only.

Question is if MR. A  can claim HRA exemption on Gratuity and Income from other sources in F.y. 2020-21 in ITR for the year?

Data is - Mr. A's Gratuity (on resignation, before retirement - non Govt) is 4 lac + Income from other sources 6 Lac and Rent paid during the year is 3.6 lacs.

As ITR filing is due soon, please reply as soon as possible.