Explanation

 The synthetic fiber known as artificial silk is called rayon.

Rayon is a semi-synthetic fiber derived from natural sources like wood pulp

Explanation

 The International Committee of the Red Cross is not a UN agency. 

(ICRC) stands for the International Committee of the Red Cross

It is a humanitarian organization 

Founder of the Red Cross: Henry Dunant

It was founded on February 17, 1863, in Geneva, Switzerland

Headquarters of the Red Cross: Geneva, Switzerland

The parent organization of the ICRC is: International Red Cross and Red Crescent Movement

***

The International Committee of the Red Cross (ICRC) has won the Nobel Prize three Times:

1. 1917,
2. 1944,
3. 1963

Explanation

 Copper was first used by man over 10,000 years ago

The period following the use of copper is sometimes referred to as the Copper Age or Chalcolithic Age. 

Explanation

Hydrogen and helium are the two lightest gases, both significantly lighter than air. 

Hydrogen: Considered the lightest gas.

Helium: Also lighter than air, but twice as heavy as hydrogen.

Air: Has a higher molecular weight than both hydrogen and helium. 

Explanation

Red phosphorus is the form of phosphorus used in safety matches.

It's found on the striking surface of the matchbox, not in the match head itself.

This design separation prevents the match from spontaneously igniting. 

Explanation

The August Offer was made by Viceroy Lord Linlithgow in 1940

It an attempt to secure Indian support for the British war effort during World War II

It did not offer complete independence or resolve Hindu-Muslim differences — hence, option (a) is correct.

Explanation

The All India Muslim League rejected the Wavell Plan of 1945

Because it did not grant the League exclusive rights to nominate all Muslim members to the Executive Council

Explanation

Gandhi-Irwin Pact, agreement signed on March 5, 1931

Between Mohandas K. Gandhi, leader of the Indian nationalist movement

Lord Irwin (later Lord Halifax), British viceroy (1926–31) of India

Participants: Mahatma Gandhi, George Montagu 

Date: March 5, 1931

Location: India

Explanation

Japan participated in World War II from 1939 to 1945 as a member of the Axis.

Japan's losses were substantial, with about 1.972 million deaths. 

World War II, or the Second World War, was a global war that started in 1939 

The Little Boy type of bomb, was dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II

The Fat Man was dropped on Nagasaki, Japan, on August 9, 1945, at 11:01 AM

the 2nd World War End on 1945

Explanation

The significance of the 25th annual session of the All India Muslim League was Allama Iqbal's Allahabad Address

On the afternoon of Monday, 29 December 1930, at Allahabad, India.