What Is the Following Is Invalid Header File in C

question 26

Multiple Choice

What is the following is invalid header file in C?

• A)math.h
• B)mathio.h
• C)string.h
• D)ctype.h

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Definitions:

Sales Forecast

The total sales of a product that a firm expects to sell during a specified time period under specified environmental conditions and its own marketing efforts.

Marketing Efforts

Activities and strategies employed by companies to promote and sell their products or services to target customers.

Patronage

The support or regular business given to a store, restaurant, or public establishment by customers.