Explanation

The correct preposition is "to" — we say "a preface to a book." 

He has written a preface to this book.

Explanation

Lake Malawi is primarily located in the country of Malawi,

But it is also bordered by Mozambique and Tanzania.

Malawi contains the largest portion of the lake, which covers about one-fifth of the country's total land area. 

It is the fourth-largest freshwater lake in the world by volume,

The ninth-largest lake in the world by area

The third largest and second deepest lake in Africa.

Explanation

A monitor is used as a VDU (Visual Display Unit). 

 A VDU refers to the device that displays visual output from a computer, and a monitor is the primary device used for this purpose. 

Explanation

Hard disks are considered long-term memory in a computer because they retain data even when the computer is powered off,

Unlike RAM (Random Access Memory) which is volatile and loses data when the power is off. 

Explanation

The Pakistan Environment and Protection Agency is now called the Pakistan Environmental Protection Agency, often abbreviated as Pak-EPA.

The agency operates under the Pakistan Environmental Protection Act (PEPA) 1997. 

Formed November 9, 1997

Explanation

Fasting Siddhartha or Fasting Buddha.  

Location: Housed in the Lahore Museum, Pakistan.  

Origin: Discovered in the Gandhara region, an ancient Buddhist center.  

Material: Made of grey schist (stone).  

Period: Belongs to the 2nd–3rd century CE, from the Kushan Empire period.  

Depiction: Shows Buddha during his severe asceticism, before attaining enlightenment.  

 Significance: Symbolizes sacrifice, discipline, and spiritual determination in Buddhism.

Explanation

The Legal Framework Order, 1970  was issued by the President of Pakistan Muhammad Yahya Khan.

 The LFO also dissolved the "One Unit" scheme of West Pakistan.

Explanation

A fission reaction is a chemical reaction in which an atomic nucleus splits into smaller parts, releasing energy.

It typically occurs in nuclear reactors and atomic bombs.

Explanation

• First Five-Year Plan (1950-1955): Presented by Prime Minister Liaquat Ali Khan on July 8, 1948.
• Second Five-Year Plan (1960-1965): Revived and restated by President Ayub Khan's military government.
• Third Five-Year Plan (1965-1970): Designed like its predecessor, resulting in only modest growth.
• Fourth Five-Year Plan (1970-1975): Abandoned after the fall of Dhaka and replaced with a nationalization program.
• Fifth Five-Year Plan (1978-1983): Aimed to stabilize the economy and improve living standards for the poorest segment of the population.

Explanation

1947–1953: Neutrality,

1954–1962: Alliances,

1963–1978: Bilateralism,

1979–1989: Alliances,

1990–present: Post-Cold War.