An Arts/Humanities student must have completed his undergraduate degree from a recognized university and would be eligible for selection in Indian Army and Officers Training Academy (OTA) only. Maximum age accepted is 24 years for both Male and Female.
For Military Services you need to prepare English, General Awareness and Elementary Mathematics. And English and General Awareness for OTA. So being an arts student if you apply for IMA then you need to practice Mathematics as well. For further doubts, follow; CDS