Correct option is A
Syenite is a type of igneous rock formed from the cooling of magma with high potassium content. Geological classification -
Sedimentary rock - formed by weathering action of existing rock. Ex. Sand-stone, Lime-stone, Shales, Gravel, Lignite.
Igneous Rock - formed by cooling & solidification of magma & lava. Ex. Trap, Dolerite, Rhyolite, Syenite, Pegmatite, Diorite, Basalt,
Meta-morphic Rock - Igneous & Sedimentary rocks are undergone considerable change with high pressure & temperature. Ex- Marble (made from lime - stone), Quartzite (made from sand-stone), Static.
