They occur during both monsoon and post-monsoon seasons: This statement is accurate.
Tropical cyclones in India are most common during two periods:
The pre-monsoon season (April-May)
The post-monsoon season (October-December)
There can be instances of cyclones during the monsoon season as well. So in general it is accurate to say they occur in monsoon and post monsoon seasons.
They primarily affect the inland regions rather than coastal regions : This statement is incorrect.
Tropical cyclones derive their energy from warm ocean waters.
Therefore, they primarily form over and impact coastal regions.
The impact of a cyclone reduces as it moves in land
Coastal areas are where the worst of the impact of wind and storm surge is felt.