There are four metals K, L M and N. Identify them by using the hints given below.
K forms basic oxide.
L forms amphoteric oxide.
Oxide of M dissolves in water to form alkali.
N does not react with water at all.

Options

A. `K to Zn, L to Al, M to Na, N to Fe `
B. `K to Fe, L to Na, M to K, N to Zn`
C. `K to K, L to Cu, M to Pb, N to Na`
D. `K to Cu, L to Zn, M to K, M to Pb`

Explanation

To identify the metals K, L, M, and N based on the given hints, we can analyze each hint step by step:

1. **K forms basic oxide.**
- Basic oxides are typically formed by metals that react with acids. Common metals that form basic oxides include sodium (Na), potassium (K), calcium (Ca), and copper (Cu).
- For this hint, we can consider **K to be Copper (Cu)**, as its oxide (CuO) is a basic oxide.

2. **L forms amphoteric oxide.**
- Amphoteric oxides can react with both acids and bases. Common examples include zinc oxide (ZnO) and aluminum oxide (Al2O3).
- Based on this hint, **L can be Zinc (Zn)**, as zinc oxide is amphoteric.

3. **Oxide of M dissolves in water to form alkali.**
- Alkali is formed when metal oxides dissolve in water, typically from alkali metals like sodium (Na) or potassium (K).
- For this hint, **M can be Potassium (K)**, as its oxide (K2O) dissolves in water to form potassium hydroxide (KOH), which is an alkali.

4. **N does not react with water at all.**
- Metals that do not react with water include lead (Pb), gold (Au), and platinum (Pt).
- Based on this hint, **N can be Lead (Pb)**, as it does not react with water.

### Summary of Identifications:
- K = Copper (Cu)
- L = Zinc (Zn)
- M = Potassium (K)
- N = Lead (Pb)