In a four-bar linkage, S denotes the shortest link length,

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In a four-bar linkage, S denotes the shortest link length, L is the longest link length, P and Q are the lengths of other two links. At least one of the three moving links will rotate by 360° if

1. S + L ≤ P + Q
2. S + L > P + Q
3. S + P ≤ L + Q
4. S + P > L + Q

Correct Option: A

According to Grashoff’s Criteria.
S + L ≤ P + Q