{:("LIst-1 Name of the region","List-2"),((A)"Mesosphere",(1)N_(2)", "O_(2)" ,"CO_(2)", "HO_(2)O "Maintenance of beat balance"),((B)"Stratosphere",(2)O_(3)"Prevents the u.v radiations reaching the earth"),((C)"Troposphere ",(3)O_(2)^(+)" ,"NO^(+)"Non- propagation of sound waves"),((D)"Thermosphere",(4)O_(2)^(+)" ," O^(+)", "NO^(+)"Ionization of gases"):} The correct match is

{:("LIst-1 Name of the region","List-2"),((A)"Mesosphere",(1)N_(2)", "

1.	{:("LIst-1 Name of the region","List-2"),((A)"Mesosphere",(1)N_(2)", "O_(2)" ,"CO_(2)", "HO_(2)O "Maintenance of beat balance"),((B)"Stratosphere",(2)O_(3)"Prevents the u.v radiations reaching the earth"),((C)"Troposphere ",(3)O_(2)^(+)" ,"NO^(+)"Non- propagation of sound waves"),((D)"Thermosphere",(4)O_(2)^(+)" ," O^(+)", "NO^(+)"Ionization of gases"):} The correct match is
Answer» `{:(A,B,C,D),(3,2,4,1):}` `{:(A,B,C,D),(3,2,1,4):}` `{:(A,B,C,D),(3,1,2,4):}` `{:(A,B,C,D),(1,3,4,2):}` ANSWER :B