Consider the following statements for a 4-cylinder in-line engine whose cranks are arranged at regular intervals of \(90^{\circ}\).

1). There are 8 possible firing orders for 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 .