Which of the following is correct?

1. Full form of CNG is compressed natural gas.

2. Full form of LPG is liquefied petroleum gas.

Choose the correct option.

Consider the following statements regarding biocatalysts,
$1.$ Biocatalysts are enzyme.
$2.$ All proteins are biocatalysts.
$3.$ Biocatalysts are minerals.

Which of the statement(s) given above is/are correct?

Consider the following statements:
$1.$ Ethyl acetic acid is a colourless neutral liquid with a characteristic fruity odour.
$2.$ Urea is the final decomposition product of proteins and occurs in urine.

Which of the statement(s) given above is/are correct? Select the correct answer using the codes below.

Consider the following statements,

1. Wood, coal and charcoal are solid fuels.

2. Methane, butane and hydrogen are gaseous fuels.

3. Kerosene, petrol and ethyl alcohol are liquid fuels.

Which of the following fuel has maximum calorific value?