Which of the following pairs is/are correctly matched? [NDA]1. Isotopes: Atoms with same atomic number but different atomic mass2. Isobars: Atoms with same number of neutrons but different atomic number3 Isotones: Atoms with same mass number but different atomic numberSelect the correct answer using the code given below:Code:

Which of the following pairs is/are correctly matched? [NDA]1. Isotope

1.	Which of the following pairs is/are correctly matched? [NDA]1. Isotopes: Atoms with same atomic number but different atomic mass2. Isobars: Atoms with same number of neutrons but different atomic number3 Isotones: Atoms with same mass number but different atomic numberSelect the correct answer using the code given below:Code:
A.	1, 2 and 3
B.	1 only
C.	1 and 2 only
D.	2 only
Answer» C. 1 and 2 only