The correct answer is D. Oil varnish.
Oil varnish is the most durable type of varnish. It is made by dissolving resins in oil, such as linseed oil or tung oil. Oil varnishes are slow-drying, but they are very durable and can withstand a lot of wear and tear. They are also water-resistant, which makes them ideal for use on outdoor furniture and other surfaces that are exposed to the elements.
Water varnish is made by dissolving resins in water. It is a quick-drying type of varnish that is easy to apply. However, it is not as durable as oil varnish and is not recommended for use on surfaces that are exposed to a lot of wear and tear.
Spirit varnish is made by dissolving resins in alcohol. It is a quick-drying type of varnish that is easy to apply. However, it is not as durable as oil varnish and is not recommended for use on surfaces that are exposed to a lot of wear and tear.
Turpentine varnish is made by dissolving resins in turpentine. It is a quick-drying type of varnish that is easy to apply. However, it is not as durable as oil varnish and is not recommended for use on surfaces that are exposed to a lot of wear and tear.