In each question four sentences are given in which only one is correct. Choose the statement that is devoid of all grammatical errors. If all are correct, choose, “All are correct” as your answer choice.

Correct option is B

The correct sentence is (b).
(a): The correct form of the verb "make" should be "made" and not "make." Note: has indicates ownership. Ex- She has been to school. In these examples, ‘has’ shows that the subject (she, he, or it) have experienced something (been to school). Also ‘has/have’ when used as model auxiliary verb (i.e., not as a main verb), should always followed by past participle form of the verb, which is in this case ‘made’. The correct sentence would be: "Many people believe the Internet has made the postal service obsolete."
(c): The usage of ‘residue’ is wrong here, and must be replaced with ‘residual’. Residual and residue are both nouns that describe something that remains after a process or event. However, they are not synonyms. Residual refers to something that is left over after a process, but still has some value or usefulness. Residue, on the other hand, refers to something that is left over after a process, but is no longer useful or valuable.
(d) the usage of ‘screen’ is wrong here, and must be replaced with ‘onscreen’. These two words imply complete different meaning. On-screen means appearing on the screen of a television, cinema, or computer. Whereas, ‘screen’ simply means a flat surface on which a picture or series of pictures is projected or reflected.