The correct option is C Fifth
Clearly, in every second step the word of previous step are written in the order - 3rd, 1st, 6th, 4th, 7th, 5th and 2nd.
Thus we may prepare a rearrangement draft as follows:
Batch I (9 am to 10 am/ 4 pm to 5 pm) : A B C D E F G
Batch II (10 am to 11 am/ 5 pm to 6 pm) : C A F D G E B
Batch III (11 am to 12 noon/ 6 pm to 7 pm) : F C E D B G A
Batch IV (12 noon to 1 pm/ 7 pm to 8 pm) : E F G D A B C
Batch V (1 pm to 2 pm/ 8 pm to 9 pm) : G E B D C A F
Batch VI (2 pm to 3 pm/ 9 pm to 10 pm) : B G A D F C E
From the rearrangement draft above, we have:
Batch III: at study sleep and night child good
F C E D B G A
Given passs code: child sleep night and study good at
G E B D C A F
The pattern of the given passcode resembles that of Batch V.
Hence, option (C) is the correct answer.