A student takes about 2 mL ethanoic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He reports the following observations:
Immediately a colourles and odourless gas evolves with a brisk effervescence.
the gas turns lime water milky when passed through it.
The gas burns with an explosion when a burning splinter is brough near it.
the gas extinguishes the burning splinter that is brought near it.
The correct observations are

Options

A. I,II and III
B. II,III and IV
C. III,IV and I
D. I,II and IV