Question

Moving further ahead, they reach the castle walls where Tintin sees this mysterious poster (shown below) pasted on the wall. He realised that an entrance through a secret tunnel lay behind it which can be opened by climbing the “spiraling green leaves”. He realises that the poster is hinting towards a word. So help Tintin crack the logic of the poster, which demands the 4th letter in the word.

A. H
B. B
C. E
D. D

Answer 1

The hint was the term, ‘Spiralling’ which indicated that, it was a square inside square  kind of spiral. Start from the outermost “SQUARE”, 
To get the alphabet corresponding to that particular square,  Connect each white square to the nearest x white squares in that chosen SQUARE, where x  corresponds to the number in that square  For the 6​th​ square (the central square of the whole box) use the directions given to figure  the path. 
Hence the answer is option A)H.