The best method of disposal of garbage is option 3, land filling. Land filling is a common and widely used method of garbage disposal. It involves burying the waste in an engineered landfill, where it is compacted and covered with soil. This method helps to control the release of harmful substances into the environment and prevents the spread of diseases.

Option 1, vermicomposting, is a process that uses earthworms to decompose organic waste, but it may not be suitable for all types of garbage.

Option 2, incineration, involves burning waste at high temperatures, which can release toxic gases and pollutants into the air. It is not considered the best method due to environmental concerns.

Option 4, burning, is similar to incineration and can also release harmful pollutants into the air.

Therefore, the correct answer is option 3, land filling.