How many individuals in this layout can be reached by just one individual?

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Solution

The correct option is C
7

Following is the list of people who can be reached by just one individual:
$R_{1} C_{3}, R_{3} C_{1}, R_{3} C_{3}, R_{3} C_{5}, R_{4} C_{1}, R_{4} C_{5}, R_{5} C_{4}$ represented by 2, 7, 4, 5, 3, 2, 3 respectively.

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Which of the following is true for any individual at a platform of height 1 m in this layout?

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