Which of the following are true with respect to fold mountains?
Their tops are often ** beneath snow and ice.
They form rugged peaks. 3. They are caused by contraction of the earth’* crust.
They contain a core composed of metamorphic and igneous rocks.
(a) 1, 3 and 4 (b) 2, 3 and 4 (c) 1 and 2 (d) 1 and 4