Yes, you can apply for a PhD in Computer Science-related fields after completing your MCA. Many institutions, including top universities like IITs and IIITs, accept candidates with an MCA degree, provided you meet the required eligibility criteria, such as a good academic record (CGPA) and, in some cases, a valid GATE score. Some institutes also offer direct PhD admissions for candidates with MCA. Specific eligibility and application details can be found on university websites like IIIT-Delhi or IIT Hyderabad.

For more details you can visit the link given below

https://www.careers360.com/university/jawaharlal-nehru-centre-for-advanced-scientific-research-bangalore