Fill in the blank space for the given series with the correct alternative.
$1, 3, 4, 8, 15, 27, (\dots)$

  • A
    $37$
  • B
    $44$
  • C
    $50$
  • D
    $55$

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Choose the correct alternative to complete the series: $ac...cab...baca...aba...acac$

Fill in the blank space for the given series with the correct alternative.
$3, 7, 15, 31, 63, (\dots)$

Find the missing letters for the given series from the given alternatives:
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What will come in place of the question mark $(?)$ in the following alphabet series?
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