Discussion

Explanation:

Let us suppose that the original sequence is TIMRL. As per the condition given in the question, for any of the given fingers, the scanned sequence is allowed to vary by one place for any of the given fingers. So for the sequence TIMRL, we can have the following possibilities of sequence of scans, so that it is accepted.

1] All the letters of original sequence are in place. This is possible in 1 way.
2] T & I get interchanged – 1 way
3] T & I and M & R get interchanged – 1 way
4] T & I and R & L interchanged – 1 way
5] Only R & L get interchanged – 1 way
6] Only M & R get interchanged – 1 way
7] I & M get interchanged – 1 way
8] I & M and R & L get interchanged – 1 way
So a total of 8 different sequences of scans will be accepted.

Hence, option (c).

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