Anvil-shaped bone is
1. Incus
2. Stapes
3. Malleus
4. Columella aurisa. Incus b. Stapes c. Malleus d. Columellaaris

Sure, I can convert the solutions into step-by-step format. Here is an example: Problem: Simplify the expression: $\frac{5x^2{y}^3}{10xy}$. Solution: Step 1: Simplify the numerator by dividing both terms by 5: $\frac{x^2{y}^3}{2}$. Step 2: Simplify the denominator by dividing both terms by 5: $\frac{xy}{2}$. Step 3: Combine the simplified numerator and denominator: $\frac{x^2{y}^3}{2}÷\frac{xy}{2}$. Step 4: Simplify the division by multiplying the numerator by the reciprocal of the denominator: $\frac{x^2{y}^3}{2}\cdot \frac{2}{xy}$. Step 5: Simplify by canceling out common factors: $\frac{x\cdot x\cdot y\cdot y\cdot y}{1\cdot 1\cdot 1\cdot 1\cdot 1}$. Step 6: Final answer: $x^2{y}^3$.