Question

Among the following the odd pair is:-
1)8o18 , 17Cl37
2) 18Ar40 , 7N14
3) 14Si30 , 15P31
4) 24Cr54 , 19K39
The answer is Option C, but how it came? Pls explain me......
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Answer 1

Answer:

The answer is option C which is 14Si30, 15P31.

Reason: Except option C all have same density.

Explanation:

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