Question: Scottish Member of Parliament, John Drummond, was the 3rd Lennoch of a 15th-century castle located where?

Context paragraphs:
Megginch Castle: Megginch Castle is a 15th-century castle in Perth and Kinross, in central Scotland.  It was the family home of the late Cherry Drummond, 16th Baroness Strange.  It is now occupied by Lady Strange's daughter Catherine Star Violetta Herdman and her husband.

Metlika Castle: Metlika Castle (] ; Slovene: "Grad Metlika" or "Metliški Grad") is a 15th-century castle located above the old part of the town of Metlika in southeastern Slovenia, very near the Croatian border.

Bolton Castle: Bolton Castle is a 14th-century castle located in Wensleydale, Yorkshire, England (grid reference [ SE03379183] ).  The nearby village Castle Bolton takes its name from the castle.  The castle is a Grade I listed building and a Scheduled Ancient Monument.  The castle was damaged in the English Civil War, but much of it remains.  It has never been sold and is still in the ownership of the descendants of the Scrope family.

Château d'Olhain: The Château d'Olhain is a 15th-century castle located in Olhain, Fresnicourt-le-Dolmen, Pas-de-Calais, Nord-Pas-de-Calais, France.

Audley's Castle: Audley's Castle is a 15th-century castle located 1 mile (1.6 km) north-east of Strangford, County Down, Northern Ireland, on a rocky height overlooking Strangford Lough.  It is a three-storey Tower house named after its 16th century owner, John Audley.  Audley's Castle tower house and bawn is a State Care Historic Monument in the townland of Castleward, in Down District Council area, at grid ref: J5781 5058.

Castle Sinclair Girnigoe: Castle Sinclair Girnigoe is located about 3 miles north of Wick on the east coast of Caithness, Scotland.  It is considered to be one of the earliest seats of Clan Sinclair.  It comprises the ruins of two castles: the 15th-century Castle Girnigoe; and the early 17th-century Castle Sinclair.

Earl of Melfort: The titles of Viscount of Melfort and Lord Drummond of Gillestoun were created in the Peerage of Scotland on 14 April 1685 for John Drummond, second son of James Drummond, 3rd Earl of Perth, with remainder to the heirs male of his body by his second marriage, to Euphemia Wallace, failing whom to the heirs male of his body whatsoever.  He was further created, on 12 August 1686, Earl of Melfort, Viscount of Forth and Lord Drummond of Riccartoun, Castlemains and Gilstoun, also in the peerage of Scotland, and with a similar remainder.

Tykocin Castle: The Tykocin Royal Castle is a 15th-century castle located on the right bank of the river Narew in Tykocin, Poland.  It fell into ruin in the 18th century and its reconstruction began in 2002.

John Drummond, 15th Baron Strange: John Drummond, 10th of Megginch, 15th Baron Strange (born 1900, Scotland – d.1982, Isle of Man), Chief of the Baronial House and Branch of Drummond of Concraig and Lennoch within the clan Drummond and Baron of Megginch.

John Drummond, 10th of Lennoch: John Drummond (31 January 1713 – 17 June 1786), 10th of Lennoch and 3rd of Megginch Castle in Perthshire, was a Scottish Member of Parliament.

Supporting paragraphs: John Drummond, 10th of Lennoch Megginch Castle
Answer: Perth and Kinross, in central Scotland