Select the INCORRECT statements with respect to transport of \( \text{CO}_2 \) by RBCs and plasma.
i. \( 23\% \) of \( \text{CO}_2 \) released from tissue cells diffuses into plasma first and then into RBCs.
ii. Within RBCs, carbonic acid immediately dissociates into \( \text{H}^+ \) and \( \text{HCO}_3^- \).
iii. In RBCs, \( \text{CO}_2 \) combines with \( \text{H}_2\text{O} \) to form carbonic acid.
iv. \( \text{H}^+ \) ions move out of RBCs and combine with \( \text{Na}^+ \) to form \( \text{NaHCO}_3 \).
v. \( 7\% \) of \( \text{CO}_2 \) is transported in dissolved form as carbonic acid in plasma.
In the light of the above statements, choose the correct answer from the options given below.