Assertion (A): The bridge that was built over the railway track collapsed within a year of its construction. Reason (R1): The bridge had faulty design. Reason (R2): Kickbacks were paid by the contractor to the engineers.

• If only reason 1 (R1) and not reason 2 (R2) is the reason for the assertion (A).
• If only reason 2 (R2) and not reason 1 (R1) is the reason for the assertion (A).
• If both (R1) and (R2) are reasons for the assertion (A).
• If neither (R1) nor (R2) is the reason for the assertion (A).