AB पॉजिटिव रक्त समूह वाले व्यक्ति को 'सर्वग्राही' (Universal Recipient) माना जाता है क्योंकि उनके प्लाज्मा में निम्नलिखित में से किसका अभाव होता है?

Which blood group is known as the universal donor?

Which blood group is considered the universal recipient?

Which blood group in the ABO system does not contain naturally occurring anti-A or anti-B antibodies in its plasma?