Multiple choice

Fill blank (iv).

Directions: Read the following passage having some numbered blanks.

Biogas ______(i)_____ obtained from animal dung and other agricultural wastes.  Animal dung and other agricultural wastes are mixed with water and ________(ii)_______ into a digester. In the absence of air, the biomass ________(iii)_______ to give a combustible gas, _________(iv)_______ is a mixture of gases like methane, carbon dioxide, hydrogen and hydrogen sulphide.

  1. that

  2. who

  3. what

  4. which
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The rule regarding the use of ‘that’ and ‘which’ is that non-restrictive relative clauses are introduced by ‘which’. Since ‘is a mixture of gases like methane, carbon dioxide, hydrogen and hydrogen sulphide’ is a non-restrictive relative clause, so 'which' should be used.

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