Which soil is formed due to leaching?

Alluvial Soil
-Deposited by the Himalayan rivers and their tributaries.
( Black Soil
-Black in color and of volcanic origin.
-Also known as Regur soil.
( Red Soil
-Formed by the weathering of crystalline and a mixture of sand and clay.
-Reddish due to iron oxide content.
( Laterite Soil
-Formed by leaching/weathering of laterite rocks in high temperatures and heavy rainfall with alternating dry and wet periods.
-Red in color due to high iron oxide content, poor in nitrogen.
-Unable to retain moisture.