In the USSR, research on the creation of biological weapons was carried out on the basis of: Bbl6epure oguH unv HeCKOnbKO OTBeTOB: a. brucellosis bacteria b. foot and mouth disease c. smallpox E. coli d. cholera vibrio

The correct answer is c. smallpox E. coli.<br /><br />Research on the creation of biological weapons in the USSR was carried out on the basis of smallpox E. coli. Smallpox is a highly contagious and deadly disease caused by the variola virus. E. coli is a type of bacteria that can cause various infections, including food poisoning and urinary tract infections. By modifying and manipulating E. coli, scientists in the USSR were able to develop strains that could be used as biological weapons. These strains were designed to be highly virulent and easily transmitted, making them effective for use in biological warfare.