Discussion

Explanation:

Let us check how many people in the grid can reach individuals. Let us do this by moving row wise

Row 1

6 – Can be reached by 1, 2 and 4 in the same row i.e., a total of 3 people
1 – Cannot be reached by anyone
2 – Can be reached by only 1 in the same row on the left
4 – Can be reached by 3 people i.e., 2 and 3 in the same row and 2 in the column below
3 – Cannot be reached by anyone

In a similar way we proceed for the other rows

Row 2

9 – Can be reached by 6, 5, 8 and 7 i.e., of total of 4 people
5 – Can be reached by 1 and 3 i.e., a total of 2 people
3 – Can be reach by 2 and 2 i.e., a total of 2 people
2 – Cannot be reached by anyone
8 – Can be reached by 5 people i.e., 2, 3 and 5 in the same row, 3 in the column above above and 5 in the column below.

Row 3

7 – Can be reached by only 3 in the row below
8 – Can be reached 5, 7, 4, and 6 i.e., total of 4 people
4 – Can be reached by only 3 in the above row
6 – Can be reached only by 4 and 5 in the same row and 4, 2, 1 and 3 in the same column i.e., a total of 6 people
5 – Can only be reached by 2 in the same row below

Row 4

3 – Can only be reached by 1 in the row below
9 – Can be reached by 3 and 5 in the same row and 7 & 8 in the row below and above i.e., a total of 4 people
5 – Can be reached by 1 & 2 in the same row and 4 in the row above
1 – Cannot be reached by anyone
2 – Can be reached only by 1 in the same row

Row 5

1 – Cannot be reached by anyone
7 – Can be reached by 1 and 6 in the same row i.e., a total of 2 people
6 – Can be reached by 5 in the row above and 3 in the same row. i.e., a total of 2 people
3 – Can be reached only by 1 in the row above
9 – Can be reached by 3, 6 and 7 in the same row and 2, 5 and 8 in the rows above i.e., a total of 6 people

Looking at the table we can see the person having height 2 m in the 1st row, people having height 7 m, 4 m and 5 m in the 3rd row, people having height 3 m and 2 m in the 4th row and the person having height 3 m in the 5th row i.e., a total of 7 people can be reached by only one person.

In the last row there is only one individual with height 3 m who cannot be reached.

So option [1] is ruled out. Similarly, in the 4th row there is only one person with height 1 m who cannot be reached by anyone. So option [2] is also incorrect.

In the 4th column, there are 2 people, one with 2 m height and one with 1 m height who cannot be reached by anyone.

So option [3] is correct. In the middle column there is no one who cannot be reached by anyone. So option [4] is also incorrect.

Hence, option (c).

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