Chemistry · Structure of atom

Match List-I with List-II: List-I List-II A Protium I Radioactive hydrogen isotope B Deuterium II Contains 1 proton and 0 neutrons C Tritium III Contains 1 proton and 1 neutron D Isobars IV Same mass number, different atomic number Choose the correct answer from the options given below:

1. A
   A-(I), B-(II), C-(III), D-(IV)
2. B
   A-(II), B-(III), C-(I), D-(IV)
3. C
   A-(IV), B-(I), C-(II), D-(III)
4. D
   A-(III), B-(IV), C-(II), D-(I)