Assertion : Ampullae of lorenzini are found beneath the skin of head region in fishes. Reason : Ampullae of lorenzini acts as receptors.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false

Assertion : Ampullae of lorenzini are found beneath the skin of head r

1.	Assertion : Ampullae of lorenzini are found beneath the skin of head region in fishes. Reason : Ampullae of lorenzini acts as receptors.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false
Answer» Correct Answer - B The ampullae of Lorenzini are found in clusters on the dorsal and ventral surfaces of the head embeded below the skin but opening externally on the surface of the skin. The ampullae of Lorenzini were formerly regarded as neuromast organs but Sand (1938) had proved that these are thermoreceptor organs. The change in the temperature of water is carried to the brain through the ampullary receptors.