How many such pairs of letters are there in the word HINDUSTAN (in both forward and backward directions) which have as many letters between them in the word as there are in the English alphabetical order?
A2
B3
C4
D1
A2
B3
C4
D1
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A dice has its faces marked by letters C, L, A, U, T and E. Two positions of the same dice are shown in the given figures. Which face is opposite to face A?