39 (Refer to FAA-CT-8080-2G, Figure 12.) The wind direction and velocity at KJFK is from
B. 180° magnetic at 4 knots.
Surface aviation weather observations (METARs) are a compilation of elements of the current weather at individual ground stations across the United States. (METAR is the MEteorological Terminal Aviation Routine weather report station network.)
Wikipedia is a good, concise source of METAR codes.
This is not the correct answer.