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In each of the following
questions, a statement of Assertion (A) is given followed by corresponding statement of Reason \( (R) \).
Of the statements, mark the correct answer as
(a) If both \( \mathrm{A} \) and \( \mathrm{R} \) are true and \( \mathrm{R} \) is the correct explanation of \( \mathrm{A} \).
(b) If both \( A \) and \( R \) are true, but \( R \) is not the correct explanation of A.
(c) If \( A \) is true, but \( R \) is false.
(d) If \( \mathrm{A} \) is false, but \( \mathrm{R} \) is true.
Assertion (A) Algae are the primary producers of many food cycles.
Reason (R) Half of the total carbon dioxide-fixation on earth is carried out by algae.
\( \mathrm{P} \)
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