The solid so formed by joining unit cubes is rotated to obtain different positions, which of these cannot be the shape after it has turned?

We follow the given pattern :-
After folding the sheet of paper in the form of a cube:
? will lie opposite ?
? will lie opposite ?
? will lie opposite ?
Symbols ? and ? cannot be on adjacent faces.
So, Answer Figure (3) can be ruled out.
Symbols ? and ? cannot be on adjacent faces.
So, Answer Figure (4) can be ruled out.
? and ? can not be on adjacent sides.
Hence options (1) is not true.
Hence option (2) is true.

As per the given pattern in question figure , we can find the similar next position of given dice .
The seven colours of a Rainbow are: Violet, Indigo, Blue, Green, Yellow, Orange and Red.
Thus, Violet colour of rainbow is left out.

On the basis of following pattern in given dices , we can say that
The numbers 2, 4, 5 and 6 are on the adjacent faces of number 3.
So, number 1 lies opposite 3.
The number 5 is on the adjacent faces of numbers 4 and 6.
So, number 5 lies opposite 2.

As per the given above open dice , we have
When folded in the form of a cube, then 'F' appears opposite 'B'; 'E' appears opposite 'C' and 'A' appears opposite 'D'.
In option (1) 'F' is adjacent to 'B'.
In option (3) 'E' is adjacent to 'C'.
In option (4) 'D' is adjacent to 'A'.

From the given above figure , we can count the total numbers of cubes :-
Altogether there are 9 + 5 +1 = 15 cubes.
10 cubes are seen in the figure.
So, five cubes are unseen in the figure.

We follow the given pattern :-
Symbols ?, ?, ?
and ? lie on the faces adjacent to the symbol *Omicron;.
Therefore,? lies opposite ?.

From the above given diagram , we can say that
Six cubes are visible and four cubes are hidden.
Thus , there are 10 cubes .

We follow the given pattern :-
Orange, Yellow, Red and Black colours are on the faces adjacent to Pink colour.
Therefore, Blue colour is opposite to Pink colour.
Pink, Black, Blue and Yellow colours on the faces adjacent to Red colour.
Therefore, Orange colour is opposite to Red colour.

As per the given pattern in question figure , we can find the similar next position of given dice .
Yellow, Green, Blue and Violet are on the faces adjacent to Red colour.
Therefore, sixth colour is opposite to Red.
From the four views of cube, it is clear that yellow is opposite to Blue.

There are total 42 cubes present in the upper portion.
Then total cubes be 42 × 2 = 84
Second method to find out the number of cubes/blocks.
24 columns with 2 cubes each = 24 × 2 = 48
14 columns with 2 cubes each = 28
4 columns with 2 cubes each = 8
Total cubes = 48 + 28 + 8 = 84