The correct answer is A. Input file.
An input file is a file that is read by a computer program. It can contain data, instructions, or both. The program will read the data from the file and use it to perform its tasks.
An output file is a file that is written by a computer program. It can contain data, results, or both. The program will write the data to the file so that it can be saved or used by another program.
A random access file is a file that can be accessed in any order. The program can read or write data from any location in the file.
A sequential file is a file that can only be accessed in order. The program must read or write data from the beginning of the file to the end.
In this case, the question is asking about files that are read by a computer. The only option that fits this description is A. Input file.