Which is correct: 'perlantikan' or 'pelantikan'?

Between 'perlantikan' and 'pelantikan', which is correct?

To ascertain it, try to see whether you can write 'berlantik' or 'melantik'. If you can write both, then both are correct. Suppose you can write 'berlantik', then 'perlantikan' is correct. On the other hand, if you can write 'melantik', then 'pelantikan' is correct.

From the explanation give above, obviously, 'pelantikan' (the act of appointing someone to a post) is correct. You can construct a sentence such as the one below:

Pelantikan ketua kelas dilakukan oleh ketua tingkatan sendiri.
[The appointment of the class monitor was done by the form teacher.)