G-6-P dehydrogenase deficiency is associated with haemolysis of:

G-6-P dehydrogenase deficiency is associated with haemolysis of RBCs. G-6-P dehydrogenase is an enzyme that plays a critical role in the pentose phosphate pathway, which is important for the production of NADPH and the maintenance of the integrity of RBCs. A deficiency in G-6-P dehydrogenase can lead to the breakdown of RBCs, resulting in haemolysis. So, the correct answer is option B. Notice that the other options are not correct. Lymphocytes, platelets, and leucocytes are not directly affected by G-6-P dehydrogenase deficiency.