which of the following in not a gel ?

Which of the following is incorrect regarding gel electrophoresis?

Which is not a gel ?

Which of the following is/are elastic gel?

Which of the following is/are elastic gel?

in which of the following, adsorption takes place and why? Silica gel placed in the atmosphere saturated with water.

Which of the following is correct regarding the separation of DNA fragments during gel electrophoresis?