What is the meaning of selectively permeable?

A) some molecules can pass, some are blocked.

B) molecules can pass, but objects are blocked.

C) all harmful molecules are blocked.

D) all molecules are blocked except for water.

Option (A).

Explanation:

Semipermeability or a material can be defined as its ability to allow transport of certain molecules only and other molecules cannot enter the cells.

For example, plasma membrane is selective permeable in nature that allows transport of molecules that are required by the cell, while toxic or harmful materials cannot enter inside the cell.

Thus, the correct answer is option A.