"The post has been edited. I am adding the answer in a few moment(references to which you are going to find in the doubts section)"
I have found out the 'initial' arrangement as given in the answer. However, I can't solve the 'rearrangement'.
I have started with A: Block no. 5 remains at original place. Thus, A stays at original place.
Then I go to B: Swap positions with block no. 5. So A and B swap positions.
Then I come to C: Swap positions with block 7 places above. If not possible, swap positions with block two places below.
But there are no blocks either 7 places above C, nor 2 places below C.
Source: SBI PO Mains Examination Question
Directions [Set of 2 questions]: Anupam was playing with blocks. He had 14 blocks out of which only 6 had alphabets and numbers written on them. Rest of the blocks were blank, and nothing was printed on them. The alphabets were A, B. C. D. E and F. The numbers were 1. 2, 3, 4. 5 and 6 not necessarily in the same order. Any block had only 1 alphabet and only 1 number written on it. Anupam arranged all the blocks in a stack and then rearranged the blocks as per some rules related to the number on them. He rearranged the blocks in alphabetical order i.e. block A was moved first, followed by B and so on.
• F's position from the top of the stack was equal to D's position from the bottom of the stack. F was somewhere above D
• C was above D with a gap of 6 blocks in between them
• The block with value 2 was below F with a gap of 8 blocks in between them
• The number on E was thrice as that of the number on B
• The block kept 6th from the top initially, had the least value
• B was above E with a gap of 2 blocks in between them
• Number of blocks below B was equal to the number of blocks above A
• Block A had a value 2 more than that on block F
• A and C were kept at a gap of 1 block. The rules related to the rearrangement are as follows:
• The block with number 1: Swap positions with the block 7 positions above, if not possible, swap positions with the block kept 2 positions below
• The block with number 2: Swap positions with the block having number 5
• The block with number 3: Swap positions with the block 6 places above, if not possible; block remains at the original place
• The block with number 4: Swap positions with the block with number 1 on it • The block with number 5: Remains at the original place
• The block with number 6: Swap positions with the block kept one place above, if not possible, Swap positions with the block kept 1 place down