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The ballot for Ukraine's presidential election will include 39 candidates, a marginally slimmer field after five contenders dropped out in recent days.

The final candidates' list for the March 31 vote was announced Friday by the central elections commission.

Opinion polls suggest that no candidate is likely to get anywhere close to the 50 percent of the votes needed to win in a first round.

Television comedian Volodymyr Zelenskiy leads the pre-election surveys with support of around 25 percent. Former prime minister Yulia Tymoshenko and incumbent Petro Poroshenko are in the second and third places, although polls differ on who is in the stronger position.