Consider the following statements (X and Y stand for two different elements)
`._(32)X^(65)` and `._(33)Y^(65)` are isolopes.
`._(42)X^(89)` and `_.(42)Y^(85)` are isotopes.
`._(85)X^(174)` and `._(88)Y^(177)` have the same number of neutrons.
`._(92)X^(235)` and `._(94)Y^(235)` are isobars.
The correct statement are:

Options

A. II and IV only.
B. I, II and IV only.
C. II, III and IV only.
D. I, II, III and IV only.

Answer

C