Assertion (A): Leukocytes are also referred to as white blood cells (WBC).
Reason (R): Leukocytes are colorless because they contain hemoglobin and hemoglobin is alkaline in nature.
A and R are correct and the R is the correct explanation of A.
A and R are correct but R isn't the correct explanation of A.
A is correct but the reason is wrong.
Both A and R are false.
Leukocytes are colorless not because they contain hemoglobin, but rather because they do not contain hemoglobin. Hemoglobin is a protein found in red blood cells that gives them their red color. Leukocytes are colorless because they do not contain any significant amount of hemoglobin. Additionally, hemoglobin is actually an acidic protein, not alkaline as mentioned in the original Reason (R).
Option 3 is the correct answer.