Answer:
The correct answer is option'e':All of the options are correct
Explanation:
A buffer solution is a solution that resists a change in it's pH and is formed by mixing a weak acid and it's conjugate base or by mixing a weak base and it's conjugate acid.
In blood stream a buffer of carbonic acid and bicarbonate anion this maintaining pH in the blood stream.
Buffers are present in many biological systems such as blood, phosphate buffer, hemoglobin buffer,e.t.c.
Thus a buffer is essential in water bodies such as lakes resisting a change in pH and the buffer is formed by dissolved carbon dioxide.
