When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour a smokeless flame to Bunsen burner. A,B,C, and D respectively are `:`

Options

A. `Na,H_(2),NaOH, Zn`
B. `K,H_(2),KOH, Al`
C. `CaH_(2), Ca(OH)_(2),Sn`
D. `CaC_(2),C_(2)H_(2), Ca(OH)_(2),Fe`

Explanation

To solve the given question step by step, let's break down the information provided and analyze it systematically.

### Step 1: Identify Substance A
The question states that substance A reacts with water to produce a combustible gas B and a solution of substance C. It also mentions that A imparts a deep golden yellow color to a smokeless flame in a Bunsen burner.

**Analysis:**
- The golden yellow color in a Bunsen burner flame is characteristic of sodium (Na).
- Other alkali metals like potassium produce a violet flame, and calcium produces a brick-red flame.

**Conclusion:**
Substance A is Sodium (Na).

### Step 2: Identify Gas B
When sodium reacts with water, it produces hydrogen gas (H₂), which is a combustible gas.

**Reaction:**
\[ \text{2Na} + \text{2H}_2\text{O} \rightarrow \text{2NaOH} + \text{H}_2 \uparrow \]

**Conclusion:**
Gas B is Hydrogen (H₂).

### Step 3: Identify Substance C
From the reaction of sodium with water, we see that sodium hydroxide (NaOH) is formed, which is a strong base.

**Conclusion:**
Substance C is Sodium Hydroxide (NaOH).

### Step 4: Identify Substance D
The question states that another substance D reacts with the solution of C (NaOH) to produce the same gas B (H₂) upon warming. Additionally, D can also produce gas B when it reacts with dilute sulfuric acid at room temperature.

**Analysis:**
- A common metal that reacts with sodium hydroxide to produce hydrogen gas is zinc (Zn).
- The reaction of zinc with sodium hydroxide produces sodium zincate and hydrogen gas.

**Reaction:**
\[ \text{Zn} + \text{2NaOH} \rightarrow \text{Na}_2\text{ZnO}_2 + \text{H}_2 \uparrow \]

- Furthermore, zinc reacts with dilute sulfuric acid to produce zinc sulfate and hydrogen gas.

**Reaction:**
\[ \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \uparrow \]

**Conclusion:**
Substance D is Zinc (Zn).

### Final Summary
Putting all the identified substances together:
- A = Sodium (Na)
- B = Hydrogen (H₂)
- C = Sodium Hydroxide (NaOH)
- D = Zinc (Zn)

### Answer:
A, B, C, and D respectively are: Sodium, Hydrogen, Sodium Hydroxide, Zinc.