Ancient Egyption medical treatises of around the middle of the second millennium before the Christian era, not only contain plenty of incantations and mantic recipes, but they also contain valuable compilations of pharmacological discoveries. A. Ancient Egyptian medical treatises of around the middle of the second millennium before the Christian era, not only contain plenty of incantations and mantic recipes, but they also contain valuable compilations of pharmacological discoveries. CORRECT (use THEY for subordinate clause after BUT )
B. Ancient Egyptian medical treatises around the middle of the second millenium before Christian era, contain plenty of incantations and mantic recipes but they also contain valuable compilations of pharmacological discoveries. (LACKS CONTRAST plus usin BUT +SUBJ with no comma precceded by but is not correct logical choice )
C. Ancient Egyptian Medical treatises around the middle of the second millennium before Christian era, contains plenty of incantations and mantic recipes, but they contain valuable compilations of pharmacological discoveries. (SVA error = treaties (p) + verb contains(s) )
D. Ancient Egyptian medical treatises of around the middle of the second millennium before the Christian era, not only contain plenty of incantations and also contain valuable compilations of pharmacological discoveries. (incorrect idiom to express not only X ,but/but also /also.. Y)
E. Ancient Egyptians medical treatises of around the middle of the second millennium before the Christian era, not only contain plenty of incantations, but also compilations of pharmacological valuable discoveries.( no SUBJ iven in subordinate clause . either remove comma or intoduce pronoun = they to rectify E)
IMO A