The Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics — which was signed in Moscow on August 23, 1939 — is sometimes known by what name?

The Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics — which was signed in Moscow on August 23, 1939 — is sometimes known by what name?

Zhukov-Bormann Pact
Kuznetsov-Hess Pact
Molotov–Ribbentrop Pact
Voroshilov-Heydrich Pact
Donitz-Speer Pact

The correct answer is Molotov–Ribbentrop Pact