Which among the following constitutional amendment act, reduced the age of voting from 21 years to 18 years?

Consider the following pairs:

1. Hurricane - Tropical cyclones in North Atlantic Ocean
2. Bagyo - Tropical cyclones in Philippines
3. Willy-Willy - Tropical cyclones in Australia

How many of the above pairs is / are correct?

Consider the following statements:
1. One molecule of chlorofluorocarbons (CFCs) has the same greenhouse effect as have 10,000 molecules of carbon dioxide
2. Methane has 1000 times green house gas effect as compared to CO2
Which among the above is / are correct statements?

We can hear a whooshing sound when we hold a spiral conch shell near our ears. What is the most likely reason behind this?

Recently, the Union Cabinet has approved for creation of "Madhyamik and Uchchtar Shiksha Kosh" (MUSK). With this reference, consider the following statements:

1. The proposed MUSK will be maintained as a Reserve Fund in Public Accounts of India.
2. It will be a non-lapsable fund and will be used to boost secondary and higher education in the country
3. Ministry of Human Resources and Development (MoHRD) will be the nodal agency for the administration and maintenance of the MUSK

Which of the above statements is/are correct?