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The increasing order of the first ionisa...

The increasing order of the first ionisation enthalpies of the elements`B,P,S` and `F` (lowest first) is:

A

`B lt S lt P lt F`

B

`F lt S lt P lt B`

C

`P lt S lt B lt F `

D

`B lt P lt S lt F`

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The correct Answer is:
A
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