Under the national standard Gas Cylinder Color Marking (GB/T 7144-2016), what are the mandatory cylinder body color and lettering color for industrial Dissolved Acetylene cylinders (溶解乙炔气瓶)?

1. White body (白色) with Red lettering (红色 '乙炔')
2. Sky blue body (天蓝) with Black lettering (黑色 '氧')
3. Black body (黑色) with Yellow lettering (黄色 '氮')
4. Emerald green body (深绿) with Red lettering (红色 '氢')