Russia and the U.S. agreed this week to extend which nuclear arms treaty,

Russia and the U.S. agreed this week to extend which nuclear arms treaty, just as it was set to expire at the beginning of February 2021?

Intermediate-Range Nuclear Forces Treaty (INF)
Comprehensive Nuclear-Test-Ban Treaty (CTBT)
New Strategic Arms Reduction Treaty (New START)
Partial Test Ban Treaty (PTBT)
Nuclear Non-Proliferation Treaty (NPT)

Answer: The correct answer is New Strategic Arms Reduction Treaty (New START)