A. ब्लॉगिंग
B. ई-कॉमर्स
C. तात्कालिक संदेशन
D. मोबाइल बैंकिंग

Solution

C. instant messaging

Explanation

WhatsApp primarily provides instant messaging services, allowing users to send text messages, voice messages, multimedia files (such as images and videos), and make voice and video calls over the internet.