Given pie-diagram represents the relative contribution of various greenhouse gases to total global warming. Identify the gases P, Q, R and S.

Options

A. `{:(A,B,C,D),(N_(2)O,CO_(2),"Methane",CFCs):}`
B. `{:(A,B,C,D),(CO_(2),"Methane",CFCs,N_(2)O):}`
C. `{:(A,B,C,D),("Methane",CO_(2),CFCs,N_(2)O):}`
D. `{:(A,B,C,D),(CO_(2),"Methane",N_(2)O,CFCs):}`

Answer

B