Explanation

Group O can donate red blood cells to anybody.

It's the universal donor.

Group kind O negative blood is occasionally called the generic blood donor type.

Only 7% of the population is O negative.

 ND23-4-2023

Explanation

Bronze is an Alloy consisting primarily of copper, commonly with about 12-12.5% tin .

******

RY 23-12-2022

Explanation

Umar was the second muslim Caliph and reigned during 634 to 644 CE.

THE REFORMS OF UMAR'S ERA.

Umar undertook many administrative reforms and closely oversaw public policy, establishing an advanced administration for newly conquered lands, including several new ministries and bureaucracies,

as well as ordering a census of all the Muslim territories.

During his reign, the garrison cities of Basrah and al-Kūfah were founded or expanded.

In 638, he extended and renovated the Grand Mosque in Mecca and the Mosque of the Prophet in Medina.

He also began the process of codifying Islamic law.

**********

Explanation

Chaudhry Khaliquzzaman is the author of Pathway to Pakistan.

In 1961, he published his memoirs entitled Pathway to Pakistan.

The Urdu version of the autobiography came out in 1967.

Explanation

Explanation

The first edition of “Pakistan in Transition” was published in 1975.

Explanation

Robert Brown discovered the nucleus in plant cells.

It was first described by Franz Bauer in 1804 and in more detail in 1831 by Scottish botanist Robert Brown.

Explanation

Explanation

The Battle of Siffin took place in 657 CE (37 AH).

It was fought between Caliph Ali ibn Abi Talib and Mu'awiya ibn Abi Sufyan, the governor of Syria.

Explanation

• Bair-e-Rooma, it also known as Bi'r Ruma.
• It was a well in Medina, Saudi Arabia.
• It that was known for its sweet and fresh water.
• It was a popular source of water for the people of Medina, including the Prophet Muhammad (peace be upon him) and his companions.