The correct options are
B sign
C symptom
Stomach pain is an example of a symptom because only Sarath can feel it and no one else can.
But, the presence of blood cells in the urine can be seen by the doctor and anybody else and it can be quantified as well. Therefore, it is an example of a sign.
Thus, symptom can be felt only by the patient whereas sign can be seen by everybody and it can be detected by medical devices or tests.