To answer this question, we need to understand the timeline of the development of the transistor and its application in computers.
The transistor, which is an electronic device that controls the flow of current, was invented in 1947 by John Bardeen, Walter Brattain, and William Shockley at Bell Laboratories. This invention revolutionized the field of electronics and paved the way for the development of smaller, faster, and more reliable electronic devices.
The world's first transistor computer, called the TRADIC (Transistorized Airborne Digital Computer), was built by the U.S. Air Force and came into operation in 1953. It was a small, lightweight computer designed for use in aircraft.
Now, let's go through each option to see which one is correct:
Option A) 1948 - This option is incorrect because the world's first transistor computer was not operational in 1948.
Option B) 1951 - This option is incorrect because the world's first transistor computer was not operational in 1951.
Option C) 1953 - This option is correct because the world's first transistor computer, the TRADIC, came into operation in 1953.
Option D) 1956 - This option is incorrect because the world's first transistor computer was not operational in 1956.
Therefore, the correct answer is option C. The world's first transistor computer came into operation in 1953.