Choose the correct statements from below:

A. Nuclides with same atomic number but different number of neutrons are called Isotopes.
B. Nuclides with same mass number are known as Isotopes.
C. Nuclides with same number of neutrons are called Isobars.
D. More than 99.9% mass of atom is concentrated in nucleus.

Choose the correct answer from the options given below:

A and D Only

The correct answer is Option (3) → A and D Only