How would you expect energy to change her in a chemical reaction?
energy will be increased
energy will be decreased
energy will be converted into another form
energy will be consumed

The correct answer is option (c) i.e. Energy will be converted into another form.

During a chemical reaction, energy remains unchanged, It just gets converted into another form and doesn’t increases or decreases. Excess energy is released in the form of heat, light during a chemical reaction and thus, proving the law of conservation of energy which says, energy can neither be created nor destroyed. It just gets converted from one form to another form. 

Iagree c would be the answer