Sugar + Oxygen $\to$ Carbon dioxide + Water + Energy

Which process is being explained here?

The correct option is B

Explanation of correct option

1. Respiration is the process in which glucose (sugar) is broken down with the help of oxygen to produce carbon dioxide, water and energy.

2. The chemical reaction of respiration is

$C{}_{6}H{}_{12}O{}_6+O{}_2⟶CO{}_2+H{}_{2}O+Energy$

$\left(Sugar\right)\left(Oxygen\right)$

Explanation of incorrect option.

1. In photosynthesis plants make their food by using raw materials, like sunlight, $CO{}_2$ and chlorophyll. Therefore it cannot be the correct option.

2. In the Combustion reaction, carbon-based material like paper or wood is burnt in presence of oxygen to produce carbon dioxide $CO{}_2$, water $H{}_{2}O$ and Energy, therefore, it cannot be the correct one.

Conclusive statement- Option B is correct.