Hyderabad is 3.5 hours ahead of Oslo
Best overlap: 8:30 AM to 2:30 PM in Oslo is 12:00 PM to 6:00 PM in Hyderabad.
Shoot for 8:30 AM to 2:30 PM in Oslo; your Hyderabad colleagues will see that as 12:00 PM to 6:00 PM. The overlap is wide at 6 hours, so you can protect mornings for deep work and still find plenty of meeting time. Note that Oslo follows daylight saving while Hyderabad stays put, so the times above drift by an hour seasonally.