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Observe the following statements regardi...

Observe the following statements regarding isotones `:`
`a.` `.^(39)K` and `.^(40)Ca` are isotones.
`b.` Nucleides having different atomic number `(Z)` and mass numbers `(a)` but same number of neutrons `(n)` are called isotones.
`c.` `.^(19)F` and `.^(23)Na` are isotones.
The correct answer is `-`

A

i,ii and iii are correct

B

only (i) and (ii) are correct

C

only i and iii are correct

D

only ii and iii are correct

Text Solution

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The correct Answer is:
B
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