Question : Select the correct active form of the given sentence.

Only home-cooked food is eaten by us.

Option 1: We eat only home-cooked food.

Option 2: We are eating only home-cooked food.

Option 3: We ate only home-cooked food.

Option 4: We have eaten only home-cooked food.

Question : The H5N1 virus which causes bird flu was first discovered in

Option 1: 1991

Option 2: 1995

Option 3: 1997

Option 4: 2001

Question : Who invented the Centigrade scale?

Option 1: Anders Celsius

Option 2: Daniel Gabriel Fahrenheit

Option 3: William Thomson

Option 4: Wright brothers

Question : If $α$ is an acute angle, $\tan (4α − 50°) = \cot (50° − α)$, then find the value of $α$ (in degrees).

Option 1: 60

Option 2: 45

Option 3: 30

Option 4: 90

Question : The average (arithmetic mean) of $3^{30},3^{60},$ and $3^{90}$ is:

Option 1: $3^{27}+3^{57}+3^{87}$

Option 2: $3^{60}$

Option 3: $3^{29}+3^{59}+3^{89}$

Option 4: $3^{177}$