Wood spirit is known as

Methanol

The correct answer is Option (3) → Methanol

Option 1: Ethanol

Ethanol ($C_2H_5OH$) is commonly called ethyl alcohol or spirit of wine because it is produced by fermentation of sugars in fruits and grains. It is the alcohol present in alcoholic beverages and is relatively less toxic compared to methanol. Historically, ethanol has no connection with wood distillation, so it is not called wood spirit.

Option 2: Propanol

Propanol ($C_3H_7OH$) exists as propan-1-ol and propan-2-ol (isopropyl alcohol). These alcohols are mainly prepared from petroleum products and are widely used as solvents and disinfectants. They are not obtained from wood and have never been referred to as wood spirit in chemical history or industry.

Option 3: Methanol

Methanol ($CH_3OH$) is called wood spirit or wood alcohol because it was first obtained by the destructive distillation of wood. It is highly poisonous and used as a solvent, fuel, and antifreeze. The historical method of production from wood directly gives rise to the name "wood spirit."

Option 4: Methoxymethane

Methoxymethane ($CH_3OCH_3$), also known as dimethyl ether, is an ether, not an alcohol. It is used as a propellant and fuel but has no relation to wood distillation or the term "spirit," which generally refers to alcohols.