Q: When is the International Firefighters' Day(IFFD) observed every year ?

• A. 2021-05-02 00:00:00
• B. 2021-05-04 00:00:00
• C. observed every year ? A) 2 May B) 4 May C)
• D. observed every year ? A) 2 May B) 4 May C) 3 May D) 6 May