Which of the following will come in place of the question mark $(?)$ in the order given below?
$AC, EH, IM, MR, ?$

Study of the following arrangement carefully and answer the questions given below.

$Q,E ,* ,P,M ,8 ,R,A ,@ ,C ,9 ,U,H,W, \# ,J,Z, ,S, \beta, Y,N ,5 ,\$ ,G,I,T$

If the first element in the above arrangement exchanges its position with the element in the $26 th$ position and the second with the one in the $25 th$ position and so on, which of the following will be in the tenth position from the left after rearrangement?

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
Which of the following is the sixth to the left of the eleventh from the left end of the above arrangement?

Tick the number that will come next in the following sequence:
$4, 6, 12, 14, 28, 30, (\ldots)$

Choose the correct alternative for the missing term:
$KM5, IP8, GS11, EV14, ?$

Choose the correct alternative to complete the series: $...bbca...bcca...ac...a...cb$