The relation between number of links (l) and number of joints (j) in a kinematic

Question

The relation between number of links (l) and number of joints (j) in a kinematic chain is

Options:

A . l = (1/2).(j + 2)

B . l = (2/3).(j + 2)

C . l = (3/4).(j + 3)

D . l = j + 4

Answer: Option B

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