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STATEMENT BASED
Directions: In the questions, two statements are given as statement-I and statement-II.
Mark the correct choice as:
(1) Both Statement-I and Statement-II are correct.
(2) Both Statement-I and Statement-II are incorrect.
(3) Statement-I is correct \& Statement-II is incorrect.
(4) Statement-I is incorrect \& Statement-II is correct.
Statement-I: Sino-atrial node is the natural pacemaker of the heart.
Statement-II: Out of \( 55 \%, 90-92 \% \) of plasma is water and proteins contribute \( 6-8 \) percent of it.
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