(1) 1 : 4 (2) 4: 1
(3) 1: 2 (4) 2 : 1
Which of the following are ...
In the oxidation of ...
Among the following, which ...
The rest mass of a photon ...
A source of sound S ...
As we go from species to ...
WAVES - WAVE ...
NATIONAL PARKS ...
p-BLOCK ELEMENTS ...
MOTION OF A CHARGED ...
Which of the following is ...
A standard cell is ...
There is an error of ...
A ray of light is incident ...
The maximum distance from ...
