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Consider the following statements for a 4- cylinder inline engine whose cranks are arranged at regular intervals of 90°:        

1.   There are 8 possible firing orders fort the engine.                                      

2.   Primary force will remain unbalanced for some firing orders.

Which of the statements given above is/are correct?                                         

(a) 1 only                        (b) 2 only

(c) Both 1 and 2             (d) Neither 1 nor 2

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