An input device which comprises of an exposed protruding ball held by a socket having sensors for detecting ball’s rotation for capturing input is:

The correct answer is (B) Track ball

Explanation:
● A trackball is an input device that has an exposed protruding ball held in a socket.
● The ball’s movement is detected by sensors that track its rotation, which translates into cursor movement on the screen.
● Users roll the ball with fingers or palm instead of moving the entire device.

Information Booster:
● Trackballs are often used where desk space is limited.
● They are considered ergonomic and reduce wrist movement.
● Trackballs were commonly used in early computer systems and specialized workstations.
● They are precise and suitable for graphic design and CAD applications.
● Trackballs function similarly to a mouse but remain stationary.

Additional Knowledge:
● Touchpad is commonly found on laptops and detects finger movement.
● Pointer is a general term, not a specific hardware device.
● Sensor ball is not a standard input device in computer hardware terminology.