B. Codex Vaticanus, in the Vatican Library at Rome. 
It contains the whole Bible, written in the fourth century, and is (apart from the papyri) the oldest and generally the best extant copy of the Septuagint. Description & picture from 'Our Bible & the Ancient Manuscripts' by Sir Frederick Kenyon (1895 - 4th Ed. 1939) Pg 138 & Plate XVII. (Page selection illustrated: 15 x 24cm. Page-size: 26.5 x 26cm. )