Explanation

Rene Laennec, a French physician, invented the stethoscope in 1816.

He created the first stethoscope using a wooden tube that allowed him to listen to the heart and lungs of a patient without placing his ear on their chest.

Explanation

• Air is a mixture of different gases.
• Primarily consisting of nitrogen (78%), oxygen (21%), and trace amounts of other gases.

Explanation

Explanation

Istanbul is a transcontinental city that was created naturally.

The Bosphorus strait is considered the boundary between Europe and Asia, and Istanbul straddles both sides of it.

Explanation

• RAM (Random Access Memory) is the hardware in a computing device where the operating system (OS).

• RAM is also known as read/write memory.

Explanation

Explanation

Dawn was founded by Quaid-e-Azam.

Dawn is the largest and oldest English-language newspaper in Pakistan and the country's newspaper of record. 

Dawn headquarters: Karachi

Explanation

The SI is made up of 7 base units

that define the 22 derived units with special names and symbols, which are illustrated in NIST SP 1247, SI Base Units Relationship Poster. 

Explanation

The Lodhi Dynasty was the last dynasty of the Delhi Sultanate.

It was ruling from 1451 until the defeat by Babur in 1526, which led to the establishment of the Mughal Empire.

The first dynasty of the Delhi Sultanate was the Mamluk Dynasty (also known as the Slave Dynasty), which began with Qutb al-Din Aibak in 1206.

Explanation

 پطرس بخاری اپنی مزاحیہ تحریروں کے حوالے سے مشہور ہیں،

خاص طور پر ان کی کتاب "پطرس کے مضامین"