Multiple choice Which of the following options is correct? RBCs are of several kinds whereas WBCs are of one kind. Leukocytes show amoeboid movement. WBC contains hemoglobin. The walls of auricles are thicker than that of ventricles. The average life of RBCs in our body is about 120 hours. Reveal answer Fill a bubble to check yourself B Correct answer Explanation This statement is correct.