Explanation

Step 1: Recall the definition of set difference

The set difference A - B is the set of elements that are in A but not in B.

Step 2: Calculate A - A

A = {1,2,3,4}

A - A = {} (since every element in A is also in A, the difference is the empty set)

Explanation

The increase in length (or volume) of solids when heated is specifically called thermal expansion.

Key Information:

Thermal Expansion:

• Occurs due to increased atomic vibrations with temperature.
• Linear expansion: Change in length (e.g., railroad tracks expanding in summer).
• Volumetric expansion: Change in 3D dimensions (e.g., mercury in thermometers).

Explanation

"What" is an interrogative pronoun used to ask a question.

It replaces the unknown information (in this case, the name).

Explanation

"Outdoor games" refers to games played outside, like cricket or football.

The sentence talks about a type of game, so "outdoor" is the correct adjective.

Explanation

"They exclaimed with disgust that there was a cockroach there."

The original sentence shows an exclamation ("Ooch!") expressing disgust at seeing a cockroach.

In reported speech:

• The interjection "Ooch!" becomes "exclaimed with disgust"
• The present tense "is" changes to past tense "was"
• "Here" changes to "there" (as required in reported speech)
• The conjunction "that" is added

Explanation

The word "namaz" is of Persian origin.

The Arabic word for prayer is "Salah". 

Explanation

Ashra Mubashra are those Companions of Prophet Hazrat Muhammad (P.B.U.H), who were given Good News in their life that they will be awarded Heaven.

Following is the List with Names of Ashra Mubashra:

1. Hazrat Abu Bakar (R.A)

2. Hazrat Umer Farooq (R.A)

3. Hazrat Usman (R.A)

4. Hazrat Ali (R.A)

5. Hazrat Zubair ibn-e-Awam (R.A)

6. Hazrat Talha (R.A)

7. Hazrat Abdul Rehman bin-e-Auf (R.A)

8. Hazrat Abu Obaida bin-al-Jarah (R.A)

9. Hazrat Saad bin-e-Abi Waqas (R.A)

10. Hazrat Saeed bin-e-Zaid (R.A)

Explanation

The correct preposition to use in this context is "with", as it indicates a connection or association between the subject ("what is wrong") and the person ("him").

"What is wrong with him?"

This means: What is the problem affecting him?

Explanation

Verdict means فیصلہ

Decision means فیصلہ

Explanation

I had been working since 2 O’clock.

"Had been working" is past perfect continuous tense.

It is used to show an action that started in the past and continued up to another point in the past.

"Since" is used with a specific point in time (like 2 O’clock).