Choose the correct alternative to complete the series: $...bcdbc...dcabd....bcdbc....dc....bd$

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
How many such vowels are there in the above arrangement,each of which is immediately preceded by a number and immediately followed by a consonant?

Find out the wrong term from the given series.
$1, 5, 5, 9, 7, 11, 11, 15, 12, 17$

Fill in the blank space for the given series with the correct alternative.
$225, 336, 447, (...), 669, 7710$

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?

Choose the correct alternative for the missing term:
$Q1F, S2E, U6D, W21C, ?$