The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the labels along with their functions and select the correct option.

(1) C - Vena Cava - takes blood from body parts to right atrium, P_CO2 = 45 mm Hg

(2) D - Dorsal aorta - takes blood from heart to body parts, P_O2 = 95 mm Hg

(3) A - Pulmonary vein - takes impure blood from body parts to heart, P_O2 = 60 mm Hg

(4) B - Pulmonary artery - takes blood from heart to lungs, P_O2 = 90 mm Hg.

After examining the blood groups of husband and wife, the doctor advised them not to have more than one child. The blood groups of the couple are likely to be

(1)  Male Rh^- and Female Rh⁺

(2)  Male Rh⁺ and Female Rh⁺

(3)  Male Rh⁺ and Female Rh^-

(4)  Male Rh^- and Female Rh^-

Mature RBCs lose their ability for

(1) DNA replication

(2) Anaerobic respiration

(3) Aerobic respiration and DNA replication

(4) Aerobic respiration, DNA replication and RNA synthesizing machinery

Which of the following human organs is called the 'graveyard of RBCs?
(1) Gall bladder

(2) Kidney

(3) Spleen 

(4) Liver

Identify the given figure and select the correct option 

(1) Neutrophil - phagocytic cell which destroy foreign organisms entering the body

(2) Eosinophil - their number increases during allergic infection

(3) Lymphocyte - small sized non-motile and non-phagocytic

(4) Monocyte - motile and phagocytic in nature

Which one of the following vitamins is anti-haemorrhagic?

(1) Vitamin B₁₂               

(2) Vitamin B₅

(3) Vitamin C                   

(4) Vitamin K

What is the oxidation state of iron in haemoglobin?

(1)  Fe^-

(2)  Fe²⁺

(3)  Fe³⁺

(4)  Fe⁴⁺

Ventricular diastole occurs due to a/an 

(1)  Organ system

(2)  Cell organelle

(3)  Tissue

(4)  Organ

Haemoglobin is

(1) an oxygen carrier in human blood

(2) a protein used as food supplement

(3) an oxygen scavenger in root nodules

(4) a plant protein with high lysine content

The opening between the right atrium and the right ventricle is guarded by the valve named

(1) bicuspid valve                   

(2) tricuspid valve

(3) mitral valve                       

(4) semilunar valve