Option-1: It is acidic.

Toothpaste is not typically acidic. Acidic substances can erode the tooth enamel and cause tooth sensitivity. Toothpaste is formulated to be gentle on the teeth and usually has a slightly basic pH.

Option-2: It is neutral.

Toothpaste is not usually neutral. Neutral substances have a pH of 7, which is neither acidic nor basic. Toothpaste is formulated to have a slightly basic pH to help balance the acidity in the mouth and promote oral health.

Option-3: It is basic.

This is the correct answer. Toothpaste is generally slightly basic or alkaline. This is done to neutralize the acids produced by bacteria in the mouth and help prevent tooth decay.

Option-4: It is made up of Calcium phosphate, the material of tooth enamel.

While toothpaste often contains ingredients like calcium phosphate, which can help strengthen tooth enamel, this option does not explain the general property of toothpaste. Toothpaste can vary in composition, but the key property is its slightly basic pH to promote oral health.

In conclusion, the correct answer is option 3: Toothpaste is typically slightly basic.