The correct answer is: 5.8 kg/cm2.
The minimum BP pressure is requiring on engine before continuity test is 5.8 kg/cm2. This is because the engine needs to be under pressure in order for the continuity test to be accurate. If the pressure is too low, the test results may be inaccurate.
Option A: 4.8 kg/cm2 is too low. This pressure may not be enough to create a good seal between the spark plug and the cylinder head, which could lead to inaccurate test results.
Option B: 6.00 kg/cm2 is too high. This pressure could damage the spark plug or the cylinder head, and it is not necessary for a continuity test.
Option C: 5.8 kg/cm2 is the correct answer. This pressure is high enough to create a good seal between the spark plug and the cylinder head, and it is not so high that it could damage the spark plug or the cylinder head.
Option D: 5.00 kg/cm2 is too low. This pressure may not be enough to create a good seal between the spark plug and the cylinder head, which could lead to inaccurate test results.