# N 3 P 2 J @ O 4 S G 6 & 5 7 Z H $ I 1 Q 8 % P

Which among the following element is 6th to the left of 21st element from left end?

The correct option is 7.

Let's break down the solution step-by-step to find the required element from the given sequence.

Step 1: Understand the given sequence
The given sequence of elements is:
# N 3 P 2 J @ O 4 S G 6 & 5 7 Z H $ I 1 Q 8 % P

Step 2: Understand the position rule
When asked to find an element that is "6th to the left of 21st element from left end", we are moving in the same direction (from left to left). In such positional questions:
$\text{Effective position from left end}=\text{21st position}-\text{6th position}=\text{15th position from the left end}$

Step 3: Count the elements from the left end
Let's count up to the 15th element starting from the left end (#):

1st element: #
2nd element: N
3rd element: 3
4th element: P
5th element: 2
6th element: J
7th element: @
8th element: O
9th element: 4
10th element: S
11th element: G
12th element: 6
13th element: &
14th element: 5
15th element: 7

Alternatively, verifying by finding the 21st element first:
16th: Z, 17th: H, 18th: $, 19th: I, 20th: 1, 21st: Q.
Moving 6 steps to the left from 'Q' (21st element):
1 step left: 1
2 steps left: I
3 steps left: $
4 steps left: H
5 steps left: Z
6 steps left: 7

Therefore, the 15th element from the left end (which is 6th to the left of the 21st element) is 7.