Transport of carbon dioxide

The majority of carbon dioxide produced by our body cells is transported to the lungs -

_______ is an excellent abdorbent of carbon dioxide .

Maximum amount of carbon dioxide is transported in the blood as:

Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

Assertion (A) Beryllium carbonate is kept in the atomsphere of carbon dioxide. Reason (R) Beryllium carbonate is unstable and decomposes to given beryllium oxide and carbon dioxide.

The critical temperature of carbon dioxide is 304.3K. Which statement is true about the behaviour of carbon dioxide above this temperature?