Step 1: Understanding the Question.
The question asks about the vitamin that must be included sufficiently in the diet to prevent haemorrhage (excessive bleeding).
Step 2: Analyzing the options.
(A) Vitamin E: This vitamin is important for protecting cells from damage but does not directly prevent haemorrhage.
(B) Vitamin C: While vitamin C is important for overall health, it is not specifically linked to haemorrhage prevention.
(C) Vitamin P: Correct — Vitamin P, also known as bioflavonoids, is important for strengthening capillaries and preventing haemorrhage.
(D) Vitamin K: This vitamin is involved in blood clotting but is not directly connected to preventing haemorrhage from capillary fragility.
Step 3: Conclusion.
The correct answer is (C) Vitamin P, as it is specifically linked to preventing haemorrhage by strengthening blood vessels.