Boma won the Head of Challenge during the arena games today.
The housemate, who had the highest number on the scoreboard at the games, picked Jackie B as his deputy.
Boma and Jackie B are free from being nominated for eviction this week.
Unlike the previous week, Big Brother instructed Boma to take 14 minutes to make up his mind about his deputy.
The move was also in a bid to accommodate the nomination night which saw housemates Maria and Pere nominate Beatrice, Yerins, Jay Paul, Niyi and White Money.
Exercising his veto power as HOH, Boma swapped Jay Paul for Yousef then proceeded to select Jackie B as his deputy.