भूपृष्ठापासून अतिखोलीवर विस्तीर्ण आकाराचे खडक निर्माण होतात त्यांना ______ खडक म्हणतात.

The correct answer is Option B (Batholiths).

Key Points:
• Intrusive Plutonic Igneous Rock Formations:
• When magma cools and solidifies deep beneath the Earth's crust, it creates massive intrusive plutonic rock structures:
• 1. Batholiths (बॅथोलिथ): Immense, colossal bodies of igneous rock (chiefly granite) extending across hundreds of square kilometers at great depths with no demonstrable floor, forming the core of mountain systems.
• 2. Laccoliths (लॅकोलिथ): Dome-shaped/mushroom-shaped intrusions with a flat bottom feeding pipe.
• 3. Sills (सील): Horizontal, planar concordant magma intrusions solidified parallel to existing sedimentary strata.
• 4. Dykes/Dikes (डाईक): Vertical or steeply inclined discordant wall-like intrusions cutting across bedding planes.
• Thus, expansive rock bodies at great depth are Batholiths (Option 2).
• Key Takeaway: Massive, extensive igneous rock bodies formed at great crustal depths are known as Batholiths.