Directions: In this section, each item consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly on the Answer Sheet.

S1 : Global warming or climate change has today become a major threat to mankind.

S6 : Due to activities like fossil fuel combustion for electricity generation, transportation, and heating, human beings have contributed to increasing in the CO2 concentration in the atmosphere.

P : It is because CO2 remains concentrated in the atmosphere for even hundreds of years.

Q : The rise in the levels of carbon dioxide (CO2) leads to a substantial increase in temperature.

R : There are various reasons for it such as greenhouse gases emanating from carbon dioxide (CO2) emissions, burning of fossil fuels or deforestation. 

S : The Earth’s temperature is on the rise.

The correct sequence should be: