Explanation

Postulates are basic assumptions in geometry accepted without proof (e.g., a line can be drawn through two points).

They form the foundation for geometric reasoning and theorems.

Explanation

HNO₃ is the chemical formula for Nitric acid, a strong mineral acid commonly used in fertilizers and explosives.

It contains one hydrogen, one nitrogen, and three oxygen atoms.

Explanation

Ivan Pavlov is famous for his experiments with dogs, where he demonstrated classical conditioning by pairing a neutral stimulus (a bell) with food, causing the dogs to salivate in response to the bell.

This type of learning involves creating an association between a stimulus and a response.

Explanation

Let's denote the initial amount Junaid had as x.

Given:

3/8 of x = 78

(3/8) * x = 78

To find x, multiply both sides by 8/3:

x = 78 * (8/3)

x = 208

Explanation

The human spine naturally has four curves: cervical, thoracic, lumbar, and sacral.

These curves, along with the intervertebral disks, help to absorb and distribute stress during movement and activities.

Explanation

Brainstorming is a group creativity technique designed to generate a large number of ideas to solve a problem.

It encourages free thinking and the sharing of ideas without immediate judgment or criticism.

Explanation

"Yourselves" is the correct reflexive pronoun for the second person plural (you and your brother).

It matches the plural subject "you and your brother" in the sentence.

Explanation

Formal education is organized, structured, and provided by schools, colleges, and universities under official rules.

It aims at the planned development and welfare of individuals in society.

Explanation

A star with an initial mass between 1 to 5 times the solar mass expands into a red giant and then collapses into a white dwarf.

A white dwarf is a dense, Earth-sized remnant of a star that has exhausted its nuclear fuel.

Explanation

Chandragupta Maurya was the founder of the Maurya Empire.

He established the first centralized government in the Indian subcontinent.

His empire included Gandhara, which is present-day northern Pakistan and parts of Afghanistan.