Multiple choice

Directions: Select the best option to fill up the blank.

Occupying about 75 percent of dry air, ___________ in the protoplasm of all living matter.

  1. the colourless gas nitrogen is also present

  2. which are colourless gases present such as nitrogen

  3. the colourless gas nitrogen also being present

  4. also since the colourless gas nitrogen is present
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(the colourless gas nitrogen is also present). Option (1) provides the correct word order. Options (2) ,(3) and (4) make use of unnecessary words, which make the sentence incomplete and meaningless. 

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