Fill in the blank space for the given series with the correct alternative.
$11, 13, 17, 19, 23, 29, 31, 37, 41, (\ldots)$

These questions are based on the following arrangement. Study it carefully and answer the questions.
$8, H, \%, 3, 7, T, A, 4, \#, 6, B, I, @, R, 1, Q, \star, L, E, 2, K, \$,U,5,9$
Which element is sixth to the right of fifteenth from the right end?

Find the missing letters for the given series from the given alternatives.
$.....bcdbc....dcabd....bcdbc....dc....bd$

Choose the correct alternative for the missing term.
$AB, DEF, HIJK, ?, STUVWX$

Find the missing letters for the given series from the given alternatives:
$b....ac....cc....cb...ab....ac$

Choose the correct alternative to complete the series: $aa...aaa.....aaaa...aaaa...b$