Red colour of blood is due to presence of - a. Plasma b. Haemoglobin c. RBC d. Cytoplasm

DEAR M GAYATHRI,

                RED COLOUR OF BLOOD IS DUE TO PRESENCE OF HAEMOGLOBIN BECAUSE IT CHANGES THE COLOUR OF BLOOD.THANK YOU.IF YOU LIKE PLEASE APPROVE IT.

@ gatathri 
option no b turns out to be the correct option . 
the red colour of the haemoglobin is due to the iron that are present in haemoglobin . 
each RBC bind with 4 molecules of haemoglobin and 4 molecules of iron , and the reaction of it will generate the red colour . 
and it purely depend upon the oxygen uptake of the creatures , 
and in some creatures they have blue blood thats come from hemocyanin . 
HOPE IT CLEARS YOUR DOUBT 

ALL THE BEST ...