PDF chapter test TRY NOW

Read the statement and select the correct answer:
 
A)
Statement 1: Air is mainly composed of hydrogen and helium.
Statement 2: The primary constituent of air is nitrogen and helium.
 
B)
Statement 1: A firki cannot rotate in a closed room.
Statement 2: A firki cannot rotate in an open room.
 
C)
Statement 1: Air does not help in playing the flute.
Statement 2: Air plays a vital role in playing the flute and harmonium.