A 40 year old female patient presents with excessive bleeding. Patient gives a history of road traffic accident 5 hours ago and had a lacerated wound on lower back region. Blood grouping test reveals presence of Anti A antibody, Anti B antibody, Anti H antibody and Anti Rh D antibody in the serum. This patient can receive transfusion from a donor having blood group-

**Core Concept**
The patient has a bleeding disorder and requires immediate blood transfusion. Her blood type is determined by the presence of antibodies against A, B, and Rh D antigens, indicating a rare blood type. The patient's blood group should be matched with the donor's blood group to prevent adverse reactions.

**Why the Correct Answer is Right**
The patient's blood group is likely to be AB Rh-null or Bombay blood group, characterized by the presence of Anti A, Anti B, Anti H, and Anti Rh D antibodies. This rare blood type occurs when an individual lacks the H antigen on their red blood cells, leading to the production of anti-H and anti-A and anti-B antibodies. To receive blood safely, the patient requires a donor with a similar blood group, which is not commonly found in the population.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not consider the presence of Anti H antibody, which is a critical factor in determining the patient's blood group.
**Option B:** This option is incorrect because it does not account for the patient's Anti Rh D antibody, which rules out Rh-positive blood groups as potential matches.
**Option C:** This option is incorrect because it does not take into consideration the rare occurrence of the patient's blood type, which requires a specific match to avoid adverse reactions.

**Clinical Pearl / High-Yield Fact**
In emergency situations, blood transfusions should be guided by the patient's blood group and antibody profile to prevent adverse reactions. The use of universal donor blood (O Rh-negative) is not always the best option, as it may not match the recipient's blood group.

**Correct Answer:** B. O Rh-null or Bombay blood group is extremely rare, however, the closest match for such a patient in terms of blood transfusion would be from an individual with a similar blood group profile.

✓ Correct Answer: D. Bombay blood group