Choose the correct alternative to complete the series: $....tu....rt....s.....; .....usrtu.....$

Choose the correct alternative to complete the series:
$ac\_\_\_\_cab\_\_\_\_baca\_\_\_\_aba\_\_\_\_acac$

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 answer

$a...cdaab...cc....daa...bbb....ccddd$

Find the missing term for the given series from the given alternatives.
$G, H, J, M, (?), V$

Fill in the blank space for the given series with the correct alternative: $2, 6, 12, 20, 30, ?$