Heat waves are trapped to maximum extent in the planet

Venus is the planet which is farther from the sun as compared to mercury but exhibit a surface temperature close to mercury. It is because of the presence of the carbon dioxide. Maximum portion of the atmosphere of Venus is made up of carbon dioxide which is a greenhouse gas and traps the heat rays. Due to trapping of the heat inside by carbon dioxide in venus its temperature becomes comparable to mercury.

Since, maximum portion is made up of greenhouse gas carbon dioxide maximum trapping takes place in Venus.

Therefore, correct option is (b) Venus.