4. With respect to Indian Standard Time (IST), which one of the following statements is not correct?
- It is used across the country for official, legal and commercial activities.
- It aims to ensure accurate and synchronised timestamps in banking, digital payments, telecom, transport, power grids and computer networks.
- Indian Standard Time Rules of 2026 has been notified under the Indian Meteorological Department Act of 1875.
- It ensures the concept of One Nation, One time.
a.
b.
c.
d.