Basic General Knowledge
To produce sound it is necessary that

the source should execute longitudinal vibrations
the vibrations of source are not necessary
the source should execute transverse vibrations
the source may execute any type of vibrations

ANSWER DOWNLOAD EXAMIANS APP

Basic General Knowledge
The Olympic Flame symbolises

sports as a means for securing harmony among nations
unity among various nations of the world
speed, perfection and strength
continuity between the ancient and modern games

ANSWER DOWNLOAD EXAMIANS APP