Choose the correct sentence among following: (A) He was promoted as DSP

Explanation
He was promoted to DSP Correct: "He was promoted DSP"   "Promote" does not take "as" when used in passive voice. Incorrect: " He was promoted as DSP"  Incorrect: "He was promote DSP" (wrong verb form)  Incorrect: "He promoted as DSP" (wrong structure) 

Explanation
The sentence " Our task had been completed before sunset " is converted to active voice, You simply need to switch the subject and object, making "We" the subject and "our task" the object, resulting in "We had completed our task before sunset.".  Passive voice structure: "Object + had been + verb (past participle) + by subject".  Active voice structure: "Subject + had + verb (past participle) + object". 

Explanation
This is an odd series   3 3 5 5 7 7 9 9 11 11 13 13....

Explanation
Starting point is A A man walks 3 km to his east i.e. AB = 3 km He turns left n walks 3 km towards north i.e. BC = 3 km He turns left n walks 3 km towards west i.e. CD = 3 km Now He is at D point D point is in the north direction of starting point. Hence he is in the north in respect to his starting point.

Explanation
Length = 6m Width = 5m Height = 5m Volume = L*W*H =6*5*4 =120

Explanation
An operating system is system software that manages computer hardware, software resources, and provides common services for computer programs.

Explanation
Spinach is vegetable all other are fruits

Explanation
Elephant is different from three

Explanation
 Diameter – Because barometer, thermometer, and lactometer are all measuring instruments , whereas diameter is a geometric term.

Explanation
9.5 x 4 =38