Answer:
![\huge\boxed{\sf Option \ A \ and \ D}](https://tex.z-dn.net/?f=%5Chuge%5Cboxed%7B%5Csf%20Option%20%5C%20A%20%5C%20and%20%5C%20D%7D)
Explanation:
Carbon has 4 electrons in its valence (outermost) shell so it makes 4 bonds with other atoms.
<u>Organic Compounds:</u>
Those compounds which consist of hydrocarbons and its derivatives are organic compounds.
So, All organic compounds consist of carbon with some exceptions still being there!
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AnonymousHelper1807</h3>
<h2>Answer:</h2>
Option B is correct.
B. In an exothermic reaction, excess energy is released as heat.
<h2>Explanation:</h2>
An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy. Exothermic Reaction means "exo" meaning releases and "thermic" means heat.
The answer is A because air expands when heated. The expansion of the air will “pop” out the dent from the inside.