Question

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm.
(b) mitochondria.
(c) chloroplast.
(d) nucleus.

Answer 1

b is the correct answer.
Hope it helps please mark this answer brainliest.
This is so because mitochondria is power house of cell and is related with question better than other option.

Answer 2

Here is your answer...
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The breakdown of pyruvate to give carbon dioxide, water and energy takes place in "mitochondria".

➡ The mitochondrion is a double-membrane-bound organelle found in most eukaryotic organisms.

➡ They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. 

▶ Mitochondria are known as the powerhouses of the cell.