Match Column-A with Column-B

i - d, ii - a, iii - b, iv - c

The correct answer is Option (4) – i - d, ii - a, iii - b, iv - c

i. Mitochondria - d. Energy generation

Mitochondria are known as the powerhouse of the cell because they produce energy in the form of adenosine triphosphate (ATP) through cellular respiration.

ii. Ribosomes - a. Protein synthesis

Ribosomes are responsible for protein synthesis in the cell. They are the site where mRNA is translated into proteins.

iii. Nucleus - b. Regulation of activity of a cell

The nucleus regulates the activity of the cell by controlling gene expression and storing the cell's genetic material (DNA).

iv. Lysosomes - c. Digestive system of a cell

Lysosomes are responsible for breaking down cellular waste and foreign particles through a process called autophagy. They contain enzymes that degrade cellular components and pathogens.