Explanation

Correct sentence: "Ali went to the factory by himself."

"To" shows direction, "by himself" shows he went alone.

Explanation

Industrial waste includes harmful chemicals and toxins dumped into rivers and lakes.

It is a major source of water pollution, harming aquatic life and contaminating drinking water.

Explanation

The correct phrase is "rest for two weeks" — "for" indicates the duration of time.

"For" is commonly used when referring to a period (e.g., for a day, for a month).

Explanation

Sindh Festival was launched to promote Sindhi culture, art, music, and heritage both locally and internationally.

It highlights historical sites like Moenjodaro and

It's aims to preserve and celebrate Sindh’s rich traditions.

Explanation

Xerophytes are plants adapted to dry environments with low water availability.

Examples include cactus and succulents, which have features to store or conserve water.

Explanation

The correct preposition to use with "deal" in this context is "with" (deal with = handle or address something).

Explanation

The correct preposition is "on" when referring to being aboard a vehicle like a train, bus, or plane.

"Seat on the train" is the standard phrase used in English.

Explanation

Balochistan reported the highest number of polio cases in Pakistan in 2024:

Balochistan: Reported the most cases with 27 infections

Sindh: Reported 23 cases

Khyber Pakhtunkhwa: Reported 22 cases

Islamabad: Reported one case

Punjab: Reported one case

Explanation

Negotiations between the nations officially began on October 13, 1962, and resulted in an agreement being signed on 2 March 1963.

It was signed by foreign ministers Chen Yi for the Chinese and Zulfikar Ali Bhutto for the Pakistani.

The eastern tip of the Wakhan Corridor starts the Sino-Pak border between the People's Republic of China and Pakistan spanning about 559 km (347.3 mi).

Zulfikar Ali Bhutto, the Minister of External Affairs of Pakistan.

Explanation

The correct preposition is "in" when referring to something located within a place or area.

The Sahara Desert is one of the most remarkable deserts in the world.