Correct Answer - C
Sulpher occurs in nature as an element and also as sulphates in soil, water and rocks. Major reservoir of sulphur is sulphate rocks. Soil and water also receive sulphates from rocks. Rainwater running over rocks gradually wears away their surface and carries off sulphur with it. Some of this sulphur soaks into the soil and some reaches ponds and lakes. A large part of sulphur is carried by the rivers to the sea where it may get locked up in sedimentary rocks. Wind may also erode the rocks, and the materials may be blown into the air as dust. Rain washes a significant amount of this matter from the atmosphere into the oceans.
