With reference to the World Health Organization (WHO) air pollution standards, consider the following statements:

1. The upper limit of PM10, or particulate matter of size exceeding 10 microgram, is 20 microgram and has now been revised to 15.

2. The new guidelines meant that among 100 global cities, Delhi’s annual PM2.5 trends in 2020 was 16.8 times more than the WHO’s revised air quality guidelines.

Which of the statements given above is/are correct?

With reference to Assam- Mizoram conflict, consider the following statements:

1. A district of undivided Assam, Lushai Hills became Mizoram as a State in 1972.

2. Mizoram has rejected the 1933 demarcation of the interstate boundary.

Which of the statements given above is/are correct?

With reference to the South Asian Association for Regional Cooperation (SAARC), consider the following statements:

1. SAARC is a regional inter-governmental organisation of South Asian countries namely, India, Bangladesh, Bhutan, Myanmar, Nepal, Pakistan and Sri Lanka.

2. SAARC includes nine formally recognised observers including the European Union, the US, Iran and China.

3. Afghanistan joined the bloc in 2007, under its then President Hamid Karzai.

Which of the statements given above is/are correct?

With reference to the Havana Syndrome, consider the following statements:

1. Havana Syndrome refers to a set of mental health symptoms that are said to be experienced by US intelligence and embassy officials in various countries.

2. It typically involves symptoms such as hearing certain sounds without any outside noise being present, nausea, vertigo and headaches, memory loss and issues with balance.

Which of the statements given above is/are correct?

National Single Window System for Investors and Businesses, recently seen in news, is an initiative of: