Since all living things must be made of cells, then true among the given choices would be - B. Something made up of one cell is considered living.
A Cell is the basic functional, structural, and biological unit of a living organism. It is the smallest unit of life. It contains all the essential components in it including hereditary unit DNA.
Thus, Molecules and pieces of the cell are neither cells nor have the above traits, therefore can not be considered as living organisms.
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