Why does it is said that looking at stars on a clear night sky means looking back in time?
A. What we are seeing at that time is actually has stated its journey millions of years back
B. What we are seeing at that time is actually has stated its journey trillions of days back
C. What we are seeing at that time is actually has stated its journey thousands of days back
D. What we are seeing at that time is actually has stated its journey thousands of kilometers away

Which of the following statements are not true?

Mark the incorrect statement with respect to evolution

1 When we see objects in our immediate surroundings we see them instantly and hence in the present time

2 When we look at stars on a clear night sky we are, looking back in time 

3 Stellar distances are measured in kilometers 

4 Huge clusters of galaxies comprise the universe

Which of the following is not true about Big Bang theory?

Which of the following options is not correct regarding the early atmosphere?

(A) Oxygen was totally absent

(B) Atmosphere was reducing

(C) Temperature was high

(D) Presence of free $H_2$ molecules

(E) Presence of molecules like $C{H}_4,$ $N{H}_3,$ $H_{2}O$ vapours

1. A, D and E

2.  A and D

3. D and E

4. A only