Questions

A DVD is an example of Optical Disc.

Now a days, printers we are using are called as laser printers. The speed of a laser printer is measured in PPM i.e, Pages Per Minute. 

Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image.

Compared to inkjet printers which use ink for printing laser printers are more expensive as they use toner which lasts for long.

QUEUE is the only word with 5 letters but sounds like one letter 'Q'.

(a) refers to political importance and (b) to economic importance. Out of (c) and (d), (c) is more important.

Karanji lake is artificial fresh water lake built in 1362.