(A) Rule of Law -> This concept was borrowed from Britain (A.V. Dicey's principle).
(B) Directive Principles of State Policies -> These were inspired by the Irish Constitution, not British.
(C) First Past the Post -> This electoral system was adopted from the British parliamentary system.
(D) Institution of the Speaker and her/his role -> The office and role of Speaker were borrowed from the British Parliament (House of Commons).
Hence, Option 3: (A), (C) and (D) only -> The Indian Constitution borrowed the Rule of Law, First Past the Post electoral system, and the Institution of Speaker from Britain, while Directive Principles were adapted from Ireland's Constitution -> correct