Sulpha drugs work like antibiotics but these are not antibiotics. Is this a valid statement, if yes then why

Why do antibiotics not work against viral infection ?

Why antibiotic do not affect cough and cold ?

Ormeloxifene is antifertility / antibiotic drug.

Antibiotics are those chemicals which are obtained from the useful micro-organisms and are employed to kill some harmful micro-organisms. But all the antibiotics donot have medicinal importance. Discuss the following: Discovery of penicillin was a serendipity. Why it is called so?

Consider the following statements (I) Antibiotics which kill the micro-organisms are know as bactericidal drugs. (II) Antibiotics which inhibit the growth of micro-organisms are known as bacteriostatic drugs. (III) Penicilin is a board spectrum antibiotic. (II) and (III); (I), (II) and (III); (I) and (II); (I) and (III).

The meanings of 'antibiotics' is 'against life', whereas with reference to humans, they are 'pro life'.Substantiate the statements with suitable example.

Two questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the followng four responses. If both Assertion and Reason are true and Reason is a correct explanation of Assertions. If both Assertion and Reason are true but Reason is not a correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion: Insulin is a type of antibiotic. .Reason: Insulin is synthesized by microbes by the process of fermentation.

Chloramphenicol is an: Antifertility drug, Antihistaminic, antiseptic and disinfectant, antibiotic-broad spectrum.