Question : In 1950-51, what percentage of the GDP of India was contributed by the industrial sector?

Option 1: 22 per cent

Option 2: 28 per cent

Option 3: 13 per cent

Option 4: 16 per cent

Question : Living organisms have been on Earth for how much per cent of Earth's history?

Option 1: 80%

Option 2: 20%

Option 3: 60%

Option 4: 40%

Question : Rupu’s income is 20% more than Madhu’s income. Madhu’s income is less than Rupu’s income by:

Option 1: $17 \frac{2}{3} \%$

Option 2: 20%

Option 3: $18 \frac{2}{3} \%$

Option 4: $16 \frac{2}{3} \%$

Question : A place where there is constant intermingling of salt water and fresh water is ____

Option 1: Estuary 

Option 2: Delta

Option 3: Gulf

Option 4: Bay

Question : ______ is a naturally occurring phenomenon that is responsible for the heating of the Earth’s surface and atmosphere.

Option 1: Greenhouse effect

Option 2: Radiation

Option 3: Global warming

Option 4: Global heating